be there vs let slide

be there

verb
  • Used other than figuratively or idiomatically: see be, there. 

  • To be available to provide comfort and support for someone, especially in a period of difficulty. 

let slide

verb
  • Used other than figuratively or idiomatically: see let, slide. 

  • To allow the condition of something to deteriorate due to negligence or apathy. 

  • To let go, allow, release, pass over without action. 

  • To tolerate a violation of a norm from. 

  • To pass out of one's thought as not being of any consequence. 

How often have the words be there and let slide occurred in a corpus of books? (source: Google Ngram Viewer )