The CountUseOfEachWord command looks for occurrences of words in essays.  The returned result will be a N x M array, where N is the number of essays, and M is the number of words.  The count at Result[i,j] will be the number of occurrences of word j in essay i.

The CountUseOfAllWords command looks for occurrences of words in essays.  The returned result will an array with N entries, where N matches the number of essays. The count at Result[i] will be the total number of occurrences of all the words found in the list specified by words.

Changes in capitalization are considered equal in the count. Changes of word form such as pluralization are not considered in the count.

These functions are part of the EssayTools package, so they can be used in the short form, for example, CountUseOfEachWord(..), only after executing the command with(EssayTools). However, they can always be accessed through the long form of the command names by using, for example, EssayTools[CountUseOfEachWord](..).

$\mathrm{with}\left(\mathrm{EssayTools}\right)$

$\left[\mathrm{AppendToWordList}\,\mathrm{BinaryCosineCoefficient}\,\mathrm{BinaryDiceCoefficient}\,\mathrm{BinaryJaccardCoefficient}\,\mathrm{BuildScoreModel}\,\mathrm{CosineCoefficient}\,\mathrm{CountMisspellings}\,\mathrm{CountUseOfAllWords}\,\mathrm{CountUseOfEachWord}\,\mathrm{DetectPlagiarism}\,\mathrm{DiceCoefficient}\,\mathrm{GetWordList}\,\mathrm{GetWordTable}\,\mathrm{IsAdjective}\,\mathrm{IsAdverb}\,\mathrm{IsConjunction}\,\mathrm{IsDefiniteArticle}\,\mathrm{IsIndefiniteArticle}\,\mathrm{IsInterjection}\,\mathrm{IsIntransitiveVerb}\,\mathrm{IsNominative}\,\mathrm{IsNoun}\,\mathrm{IsNounPhrase}\,\mathrm{IsPlural}\,\mathrm{IsPreposition}\,\mathrm{IsPronoun}\,\mathrm{IsTransitiveVerb}\,\mathrm{IsUsuallyParticipleVerb}\,\mathrm{IsVerb}\,\mathrm{JaccardCoefficient}\,\mathrm{Lemma}\,\mathrm{Misspellings}\,\mathrm{PartOfSpeech}\,\mathrm{QuadraticWeightedKappa}\,\mathrm{Reduce}\,\mathrm{Score}\,\mathrm{SetWordList}\,\mathrm{SimilarityScore}\,\mathrm{SpellCorrectWord}\,\mathrm{WordUse}\right]$

$\mathrm{CountUseOfEachWord}\left(\left[''a\; a\; b\; b\; c\; c''\,''a\; a\; a\; c''\right]\,\left[''a''\,''b''\,''c''\right]\right)$

$\left[\begin{array}{ccc}2& 2& 2\\ 3& 0& 1\end{array}\right]$

$\mathrm{CountUseOfAllWords}\left(\left[''a\; a\; b\; b\; c\; c''\,''a\; a\; a\; c''\right]\,\left[''a''\,''b''\,''c''\right]\right)$

$\left[\begin{array}{cc}3& 2\end{array}\right]$

$\mathrm{Hemingway}≔''Nothing\; happened.\; The\; fish\; just\; moved\; away\; slowly\; and\; the\; old\; man\; could\; not\; raise\; him\; an\; inch.\; His\; line\; was\; strong\; and\; made\; for\; heavy\; fish\; and\; he\; held\; it\; against\; his\; hack\; until\; it\; was\; so\; taut\; that\; beads\; of\; water\; were\; jumping\; from\; it.\; Then\; it\; began\; to\; make\; a\; slow\; hissing\; sound\; in\; the\; water\; and\; he\; still\; held\; it,\; bracing\; himself\; against\; the\; thwart\; and\; leaning\; back\; against\; the\; pull.\; The\; boat\; began\; to\; move\; slowly\; off\; toward\; the\; north-west.''\:$

$\mathrm{CountUseOfEachWord}\left(\left[\mathrm{Hemingway}\right]\,\left[''fish''\,''the''\,''old''\,''brace''\right]\right)$

$\left[\begin{array}{cccc}2& 7& 1& 0\end{array}\right]$

$\mathrm{CountUseOfEachWord}\left(\mathrm{map}\left(\mathrm{StringTools}:-\mathrm{LowerCase}\,\left[\mathrm{Hemingway}\right]\right)\,\left[''fish''\,''the''\,''old''\,''brace''\right]\right)$

$\left[\begin{array}{cccc}2& 7& 1& 0\end{array}\right]$