liquefy vs plip

liquefy

verb
  • To make into a liquid. 

  • To become liquid. 

  • To distort and warp an image. 

plip

verb
  • To make the sound of liquid hitting a hard surface. 

  • To lock or unlock using a remote control locking device. 

noun
  • A light sound or action like liquid hitting a surface. 

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