license vs rubber stamp

license

verb
  • To give formal authorization to use. 

  • To give permission or freedom to; accept. 

  • To authorize officially. 

  • To acquire authorization to use, usually in exchange for compensation. 

  • To permit (as grammatically correct). 

noun
  • The legal terms under which a person is allowed to use a product, especially software. 

  • A legal document giving official permission to do something; a permit. 

  • Freedom to deviate deliberately from normally applicable rules or practices (especially in behaviour or speech). 

  • Excessive freedom; lack of due restraint. 

rubber stamp

verb
  • To process, approve or decide matters routinely rather than through careful consideration. 

noun
  • A person or organisation that approves, routinely or as a formality, matters decided by some other person or organisation. 

  • A piece of rubber or similar material with a design or text carved or molded for the purpose of transferring ink or dye to imprint that design on another object. 

adj
  • Of a person, organisation, or process, making decisions or approving matters routinely or without real power. 

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