часто

This is the 9661st most frequent Russian word.

часто

Often.

Here, 'часто' is an adverb describing the frequency of the action 'хожу' (go).

Я часто хожу в кино.

I often go to the cinema.

'Часто' modifies the verb phrase 'бывает' (it happens), indicating frequency of occurrences.

Часто бывает, что люди делают ошибки.

Often it happens that people make mistakes.

In this sentence, 'часто' is modified by 'слишком' (too) to intensify the frequency and express an excessive action.

Он слишком часто звонит мне по телефону.

He calls me on the phone too often.