Axe vs Serpentine

Axe

name
  • A river in Dorset, Somerset, and east Devon, England, which flows into Lyme Bay at Seaton. 

  • A river in Somerset, England, which flows into the Bristol Channel at Weston-super-Mare. 

Serpentine

name
  • The lake in Hyde Park, London. 

  • A river in New Zealand. 

  • A river in Canada. 

  • A river in Alaska. 

  • A river in Australia. 

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