be there vs come across

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. 

come across

verb
  • Used other than figuratively or idiomatically: see come, across. 

  • To find, usually by accident. 

  • To produce what was desired; come up with the goods. 

  • To give an appearance or impression; to project a certain image. 

  • To change sides; to cross over to work for the opposition. 

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