baths vs lido

baths

noun
  • A building containing a public swimming pool or shower facilities; originally a place having individual cubicles where people without bathrooms could have a bath. 

lido

noun
  • An outdoor swimming pool. 

  • Part of the sea by a beach sectioned off for swimming and other aquatic activities. 

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