retain vs spurt

retain

verb
  • To employ by paying a retainer. 

  • To hold back (a pupil) instead of allowing them to advance to the next class or year. 

  • To keep in one's pay or service. 

  • To keep in possession or use. 

  • To hold secure. 

spurt

noun
  • Ejaculation of semen. 

  • The act of spurting, or something spurted 

  • A brief gush, as of liquid spurting from an orifice or a cut/wound. 

  • A moment, a short period of time. 

  • A sudden brief burst of, or increase in, speed, effort, activity, emotion or development. 

verb
  • To make a strong effort for a short period of time. 

  • To rush from a confined place in a small stream or jet. 

  • To cause to gush out suddenly or violently in a stream or jet. 

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