bookmark vs bookmarker

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. 

bookmarker

noun
  • A slip of paper, card, etc. used to mark one's place in reading a book; a bookmark. 

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