2 sentences for 便 (biàn — to relieve oneself)

1. 它们一生中的大部分时间都在高高的树梢上，每周只下来排便一次。

   tā​men yī​shēng zhōng de dà​bù​fen shí​jiān dōu zài gāo​gāo de shù​shāo shang, měi​zhōu zhǐ xià lái pái biàn yī​cì.

   They spend most of their lives high in the treetops, coming down just once per week to defecate.

   Source: CCMatrix

2. 网上许多文章声称香蕉会导致便秘。

   wǎng​shàng xǔ​duō wén​zhāng shēng​chēng xiāng​jiāo huì dǎo​zhì biàn​mì.

   Many articles on the internet claim that bananas cause constipation.

   Source: CCMatrix