gammy vs nan

gammy

noun

  • Grandmother. 

  • A blowjob; fellatio. 

adj

  • Injured, or not functioning properly (with respect to legs). 

nan

noun

  • Synonym of grandmother. 

  • Synonym of nursemaid. 

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