past tense vs upsetting

past tense

noun
  • A grammatical form (often a verb form) that is used in a conditional expression to refer to an event, transaction, occurrence, or object that is hypothetical and often counterfactual. 

  • A grammatical form (often a verb form) that refers to an event, transaction, occurrence, or object that happened (or had happened), or existed, at some time before now (the applicable reference time). 

upsetting

noun
  • The action of the verb upset. 

adj
  • Causing upset; distressing. 

  • Conceited; presumptuous. 

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