breather vs downtime

breather

noun
  • A short break; a rest or respite. 

  • A spatially localized, time-periodic excitation in a one-dimensional lattice. 

  • An air inlet path to the crankcase 

  • Something or someone that breathes. 

  • A heavy breather. 

downtime

noun
  • A period of time set aside for rest and relaxation; leisure time. 

  • The amount of time lost due to forces beyond one's control, as with a computer crash. 

How often have the words breather and downtime occurred in a corpus of books? (source: Google Ngram Viewer )