shibboleth vs verbalism

shibboleth

noun
  • A common or longstanding belief, custom, or catchphrase associated with a particular group, especially one with little current meaning or truth. 

  • A particular pronunciation or custom that is regarded as distinguishing members of a group from non-members, especially when used as a test. 

verbalism

noun
  • The excessive use of words, often with little meaning 

  • The expression of a concept in words; the wording used in such an expression 

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