cleavage vs schism

cleavage

noun
  • Any similar separation between two body parts, such as the buttocks or toes. 

  • The repeated division of a cell into daughter cells after mitosis. 

  • The hollow or separation between a woman's breasts, especially as revealed by a low neckline. 

  • The tendency of a crystal to split along specific planes. 

  • The act of cleaving or the state of being cleft. 

  • The splitting of a large molecule into smaller ones. 

  • The division of voters into voting blocs. 

schism

noun
  • A split or separation within a group or organization, typically caused by discord. 

  • a split within Christianity whereby a group no longer recognizes the Bishop of Rome as the head of the Church, but shares essentially the same beliefs with the Church of Rome. In other words, a political split without the introduction of heresy. 

  • A formal division or split within a religious body. 

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