Lay vs Mole

Lay

name

  • A river in western France. 

  • A surname. 

Mole

name

  • A river in Surrey, England, tributary to the Thames. 

  • A river in Devon, England, tributary to the Taw. 

  • A surname. 

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