acid test vs audit

acid test

noun
  • A rigorous test or appraisal of the quality or worth of something. 

  • In the 1960s, a party based around the use and advocacy of the psychedelic drug LSD ("acid"). 

audit

noun
  • An examination in general. 

  • Spiritual counseling, which forms the core of Dianetics. 

  • A judicial examination. 

  • The result of such an examination, or an account as adjusted by auditors; final account. 

  • An independent review and examination of records and activities to assess the adequacy of system controls, to ensure compliance with established policies and operational procedures, and to recommend necessary changes in controls, policies, or procedures 

verb
  • To counsel spiritually. 

  • To attend an academic class without the opportunity to receive academic credit. 

  • To conduct an independent review and examination of system records and activities in order to test the adequacy and effectiveness of data security and data integrity procedures, to ensure compliance with established policy and operational procedures, and to recommend any necessary changes 

  • To examine and adjust (e.g. an account). 

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