Linear Frequency has the dimension inverse time. The SI composite unit of linear frequency is the hertz per meter.

Maple knows the units of linear frequency listed in the following table.

An asterisk ( * ) indicates the default context, an at sign (@) indicates an abbreviation, and under the prefixes column, SI indicates that the unit takes all SI prefixes, IEC indicates that the unit takes IEC prefixes, and SI+ and SI- indicate that the unit takes only positive and negative SI prefixes, respectively.  Refer to a unit in the Units package by indexing the name or symbol with the context, for example, abbe[standard]; or, if the context is indicated as the default, by using only the unit name or symbol, for example, abbe.

The unit of linear frequency is defined as follows.

An abbe is defined as $1000$ hertz per meter.

$\mathrm{convert}\left('\mathrm{abbe}'\,'\mathrm{dimensions}'\,'\mathrm{base}'=\mathrm{true}\right)$

$\frac{1}{\mathrm{length}\mathrm{time}}$

$\mathrm{convert}\left(1\,'\mathrm{units}'\,'\mathrm{abbe}'\,\frac{'\mathrm{Hz}'}{'m'}\right)$

$1000$