oppose vs speak out

oppose

verb
  • To attempt to stop the progression of; to resist or antagonize by physical means, or by arguments, etc.; to contend against. 

  • To object to. 

  • To place in front of, or over against; to set opposite; to exhibit. 

  • To present or set up in opposition; to pose. 

speak out

verb
  • To assert or promote one's opinion; to make one's thoughts known. 

How often have the words oppose and speak out occurred in a corpus of books? (source: Google Ngram Viewer )