run dry vs spin down

run dry

verb
  • To run out; to be fully consumed; to expire. 

  • To become dry; to cease to flow with water. 

spin down

verb
  • To diminish in energy; to slow down or peter out; to be gradually canceled or ended. 

  • To reduce its speed of rotation. 

  • To reduce its spinning speed from that required for reading and writing. 

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