heed vs pass by

heed

verb
  • To mind; to regard with care; to take notice of; to attend to; to observe. 

noun
  • Careful attention. 

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 heed and pass by occurred in a corpus of books? (source: Google Ngram Viewer )