# Numeral adverb

A **numeral adverb** is an adverb that’s based on a numeral. English has three of these, namely *once*, *twice* and *thrice*.
These are a type of frequency adverb that refer to absolute frequency.

These express the number of times something happens, i.e. the number of occurrences. While *once* and *twice* are commonly used, and therefore relevant to EFL pedagogy, *thrice* is seldom used.

They can be used as the denominator to make frequency adverbials, e.g. *twice a week* or *once per day*.

Numbers higher than 3 cannot be expressed with single words. Rather, we must use equivalent phrases; numeral adverbial phrases, such as *four times*, *five times*, etc. The number 0 is also difficult to express; we tend to use *never*, though that technically is a temporal frequency adverb, any fraction with 0 as numerator is equal to 0.

*Once* can mean *one time*, but can also mean “when” or “as soon as”.

These are a type of frequency adverb that refer to absolute frequency. This can perhaps be best illustrated by considering the wh- phrase needed; for absolute frequency it is *how many times*, but for temporal frequency it is *how often*.