backflash vs recollection

backflash

noun
  • Synonym of flashback (“dramatic device”) 

  • The hazardous situation where the flame propagates backward down the hose of an oxyfuel welding and cutting system. 

recollection

noun
  • That which is recollected; something called to mind; a reminiscence. 

  • The act or practice of collecting or concentrating the mind; concentration; self-control. 

  • The act of recollecting, or recalling to the memory; the act of recalling to memory. 

  • A spiritual retreat, especially one that is short. 

  • Process of collecting again. 

  • The power of recalling ideas to the mind, or the period within which things can be recollected; remembrance. 

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