Frequency means the quality or state of being frequent.

Application of frequency adverbs;

In English, words used to express action frequency are called "frequency adverbs", such as/sometimes/always/etc. These words have different degrees.

1, frequency adverbs are usually placed before the substantive verb (1) and after the be verb (2). If there are modal verbs or auxiliary verbs in a sentence, put them between them.

For example:

I always do my homework in the afternoon. He is never friendly to us. She will never know your secret.

2. Special position of frequency adverbs: frequency adverbs, such as once or twice, can be placed after verbs or at the end of sentences (4); Some frequency adverbs can also be emphasized at the beginning of a sentence.

For example:

This car broke down twice. Sometimes I go fishing with my father.

Use specific figures to indicate the number of times something happened: once (once), twice (twice), three times and more, such as three times (three times) and ten times (ten times).