3 sentences

1. 少说也有五个钟头吧。

   shǎo shuō yě yǒu wǔ gè zhōng​tóu ba.

   I'd say a good five hours.

   Source: OpenSubtitles

2. 我等了他两个钟头。

   wǒ děng le tā liǎng gè zhōng​tóu.

   I waited for him for two hours.

   Source: Dong Chinese Dictionary

3. 我找了六个钟头。

   wǒ zhǎo le liù gè zhōng​tóu.

   I searched for six hours.

   Source: OpenSubtitles