天災は忘れた頃にやってくる（てんさいはわすれたころにやってくる）

Japanese vocabulary

Meaning: natural disasters happen when you've forgotten about the previous ones

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “天災は忘れた頃にやってくる” pronounced in real videos (YouGlish)