clamp down vs dry up

clamp down

dry up

verb
  • To manually dry dishes. 

  • To cause to become dry. 

  • To deprive someone of (something vital). 

  • To cease to exist; to disappear 

  • To become dry (often of weather); to lose water. 

  • When our money dried up, we had to get proper jobs. 

  • To stop talking; to forget what one was going to say. 

How often have the words clamp down and dry up occurred in a corpus of books? (source: Google Ngram Viewer )