out-to-lunch vs rambling

out-to-lunch

rambling

noun
  • A gentle hike. 

  • A long meandering talk with no specific topic or direction. 

adj
  • Confused and irregular; awkward. 

  • Of a speech: meandering, long and digressing. 

How often have the words out-to-lunch and rambling occurred in a corpus of books? (source: Google Ngram Viewer )