Blithe vs Culm

Blithe

name
  • A river in Staffordshire, England, which joins the River Trent. 

Culm

name
  • A river in Devon, England, which joins the River Exe near Stoke Canon. 

  • A German bishopric, founded in 1234. 

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