I'd say, not often enough.

我说大家做得很不够。

youdao

I'd say, not often enough.

我说次数不够。

youdao

For me that's far too often and sometimes not often enough.

不过对我来说一周一次有时候太频繁了，有时候又觉得还不够频繁。

youdao

They're not all found in every treaty, but they're often enough found that we can speak of these six elements.

它们并不是每个条约都能找到,但是提及六个部分，它们都能被找到。

耶鲁公开课 - 旧约导论课程节选

But it would often happen that there were not enough Corinthians who were ready to go with you on your expedition.

但是经常会没有足够的人,愿意与你一同踏上征程

耶鲁公开课 - 古希腊历史简介课程节选

And research very often delivers bad news, saying it's not enough-- the contact; it's not enough to praise.

研究往往带来坏消息，只是接触还不够;,只是赞扬还不够。

哈佛公开课 - 幸福课课程节选

Forbes wrote of him occasionally but, to my regret, not often enough.

FORBES: John E. Anderson, RIP

Sure, once in a while a fair flipped coin will give you ten heads in a row, but not often enough to worry about.

FORBES: Christmas, Kurtosis, Fat Tails, Black Swans And Risk Management, Pt. 2

Modern glass high rises occasionally demonstrate that Kiev reached the 21st Century, but luckily not often enough to forget that you are in the cradle of Slavic culture.

BBC: Weekend in Kiev