between you and me and the bedpost vs between you and me and these four walls

between you and me and the bedpost

prep

  • Synonym of between you, me, and the bedpost 

between you and me and these four walls

prep

  • Synonym of between you and me 

How often have the words between you and me and the bedpost and between you and me and these four walls occurred in a corpus of books? (source: Google Ngram Viewer )