thaw vs warm up

thaw

verb
  • To become so warm as to melt ice and snow — said in reference to the weather, and used impersonally. 

  • To gradually melt, dissolve, or become fluid; to soften from frozen 

  • To gradually cause frozen things (such as earth, snow, ice) to melt, soften, or dissolve. 

  • To grow gentle or genial. 

noun
  • The melting of ice, snow, or other frozen or congealed matter; the transformation of ice or the like into the state of a fluid; liquefaction by heat of anything congealed by frost 

  • a period of relaxation, of reduced reserve, tension, or hostility or of increased friendliness or understanding 

  • a period of weather warm enough to melt that which is frozen 

warm up

verb
  • To become warmer. 

  • To reach, or cause to reach, a normal operating temperature (of a car for example). 

  • To heat or reheat (e.g. food). 

  • To do gentle exercise, stretching etc., in order to prepare the body for more vigorous exercise. 

  • To make (an audience) enthusiastic or animated before a show 

  • To prepare for an activity by carrying out a practice or preparation routine. 

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