doot vs linger

doot

verb
  • think 

  • to scan 

  • to tap a card 

  • doubt 

noun
  • doubt 

  • beep (electronically-produced tone) 

linger

verb
  • To consider or contemplate for a period of time; to engage in analytic thinking or discussion. 

  • To remain alive or existent although still proceeding toward death or extinction; to die gradually. 

  • To stay or remain in a place or situation, especially as if unwilling to depart or not easily able to do so. 

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