bookmark vs subdivision

bookmark

noun
  • A strip of material used to mark a place in a book. 

  • A record of the address of a file or Internet page, serving as a shortcut to it. 

  • A pointer found in a nonclustered index to a row in a clustered index or a table heap 

verb
  • To create a bookmark. 

subdivision

noun
  • Such a piece that has been divided. 

  • A division into smaller pieces of something that has already been divided. 

  • A parcel of land that has been divided into lots. 

  • A group of houses created by the same builder or in the same general area. 

  • A gated community. 

verb
  • To separate something into smaller pieces. 

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