congeal vs thaw

congeal

verb
  • To change from a liquid to solid state, perhaps due to cold; called to freeze in nontechnical usage. 

  • To become congealed, solidify. 

  • To coagulate, make curdled or semi-solid such as gel or jelly. 

  • To make rigid or immobile. 

thaw

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

  • 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 

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