congeal vs glaciate

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. 

glaciate

verb
  • To freeze 

  • To erode with a glacier 

  • To cover with ice or a glacier 

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