phthiriasis vs snivel

phthiriasis

noun
  • A pediculosis. 

  • An infestation with crab lice. 

snivel

noun
  • The act of snivelling. 

  • Nasal mucus; snot. 

verb
  • To breathe heavily through the nose while it is congested with nasal mucus. 

  • To say (something) while sniffling or crying. 

  • To cry while sniffling; to whine or complain while crying. 

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