as often as

1. 每當
   As often as he's tried to go there, he's always failed.

   每次他想去那裡，總是去不成。

as often as not

1. 往往
   As often as not the buses are late on foggy days.

   每逢多霧天氣，公車往往誤點。

every so often

1. 不時，偶爾
   We meet every so often.

   我們不時見面。

more often than not

1. 多半
   Every night, more often than not, you'd find my father at the local pub.

   每天晚上你大多能在附近的小酒店裡找到我父親。