Usage patterns
〈事〉の頻度が高いfor X to occur frequently
This error occurs frequently.
〈事〉の頻度が低いfor X to occur rarely
That disease occurs at a low frequency.
〈数〉の頻度で〈動詞〉to do something at a certain frequency
I exercise at a frequency of once a week.
頻度を上げるto increase the frequency
We decided to increase the frequency of meetings.
頻度を下げるto decrease the frequency
I was told to reduce the frequency of going out.