perspire vs trickle

perspire

verb
  • To emit (sweat or perspiration) through the skin's pores. 

  • To be evacuated or excreted, or to exude, through the pores of the skin. 

trickle

verb
  • to pour a liquid in a very thin stream, or so that drops fall continuously. 

  • to flow in a very thin stream or drop continuously. 

  • To move or roll slowly. 

noun
  • A very thin river. 

  • A very thin flow; the act of trickling. 

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