perambulate vs saunter

perambulate

verb
  • To walk about, roam or stroll. 

  • To inspect (an area) on foot. 

saunter

verb
  • To stroll, or walk at a leisurely pace. 

noun
  • A leisurely walk or stroll. 

  • A leisurely pace. 

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