Tilly vs tilly

Tilly

name
  • A surname from Old French. 

  • A diminutive of the female given name Matilda. 

tilly

noun
  • A small open-backed truck. 

  • An extra product given to a customer at no additional charge; a lagniappe. 

adj
  • Containing till (unsorted glacial sediment). 

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