be with vs love up

be with

verb
  • To have sex with. 

  • To date or be boyfriend/girlfriend with. 

  • To understand someone's point or intention. 

  • To be down with (something); believe in, like, or espouse. 

  • To agree with someone. 

love up

verb
  • To make love to. 

  • To demonstrate affection for; treat in a loving way. 

  • To demonstrate affection (on somebody). 

  • To accept; to love wholeheartedly. 

How often have the words be with and love up occurred in a corpus of books? (source: Google Ngram Viewer )