come across vs pass by

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. 

pass by

verb
  • To travel past (something) without stopping; to ignore, to disregard. 

  • to drop by 

  • Of a period of time: to come to an end, to elapse. 

  • To travel past without stopping. 

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