imbricate vs protrude

imbricate

verb
  • To undergo or cause to undergo imbrication. 

  • To overlap in a regular pattern. 

protrude

verb
  • To cause to extend from a surface or boundary; to cause to stick out. 

  • To extend from, above or beyond a surface or boundary; to bulge outward; to stick out. 

  • To thrust out, as through a narrow orifice or from confinement; to cause to come forth. 

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