catch sight of vs decern

catch sight of

verb
  • to see for a brief period; to get a glimpse of 

decern

verb
  • See distinctly (with the eyes or the mind); distinguish (an object or fact); discern. 

  • transferred sense 

  • Decree a person etc. to be or to do something by judicial sentence.  (in the phrase “to decern in”, obsolete) To mulct in by decree of court. 

  • Decree by judicial sentence that something be done. 

  • intransitive 

  • with simple object 

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