有哪些关于“often”的短语

1.as often as 每当……
例As often as I saw him ,I saw him grow taller.
每次我看到他，他都又长高了。
2.as often as not=more often than not往往，常常，大半
3.every so often有时，偶尔
4.就是楼上说的how often 啦！

how often