What does 十天半月 (or 十天半个月) mean? From the novel 活着 (p.8):


  我长大以后喜欢往城里跑，常常是十天半月不回家。


I got no real idea what 十天半月 means.  Baidu suggests 十天半个月 is more common.  Literally it says "10 days; fortnight".  The closest to an answer I could find is Baidu Zhidao:


  Answer 1: 半个月之类 一星期以上 类似于 上中下旬
  Answer 2: 10~15天之间


I can't make sense of the first answer, and I have no idea if the second answer is correct.

Question: What does 十天半月 (or 十天半个月) mean?
十天半月 or 十天半個月 means 十天～半個月 (10 days to half a month).

我長大以後喜歡往城裏跑，常常是十天半月不回家。
After I grew up, I loved going into the city, often not returning home for about a fortnight at a time.


For reference, both the Baidu Zhidao answers say approximately the same thing. 上中下旬 means the first, second, or third period of a month, with a period of a month being a 旬 (10 days).