converge vs subdivide

converge

verb
  • (said of a sequence or series) To have a (finite, proper) limit. 

  • (said of two or more entities) To approach each other; to get closer and closer. 

  • (said of an iterative process) To reach a stable end point. 

subdivide

verb
  • To divide into smaller sections. 

  • To divide divisions into smaller divisions. 

  • To divide a plot of land into plots for residences; to convert open land into housing. 

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