2 sentences for 天数 (tiān​shù)

1. 出差的天数还没定下来。

   chū​chāi de tiān​shù hái méi dìng xià​lai.

   The duration of the business trip has not been decided yet.

   Source: Dong Chinese Dictionary

2. 他觉得自己已经尽力了，剩下的只能看天数如何了。

   tā jué​de zì​jǐ yǐ​jīng jìn​lì le, shèng​xià de zhǐ néng kàn tiān​shù rú​hé le.

   He felt he had done his best, and the rest was up to fate.

   Source: Dong Chinese Dictionary