pleasure cruise vs walk in the park

pleasure cruise

noun
  • A pleasant or easy situation without any challenges. 

  • A pleasure trip, especially on a ship. 

walk in the park

noun
  • Something easy or pleasant. 

  • Used other than figuratively or idiomatically: A recreational walk in a park. 

How often have the words pleasure cruise and walk in the park occurred in a corpus of books? (source: Google Ngram Viewer )