intervention vs stepping

intervention

noun
  • An action taken or procedure performed; an operation. 

  • An orchestrated attempt to convince somebody with an addiction or other psychological problem to seek professional help and/or change their behavior. 

  • The action of intervening; interfering in some course of events. 

  • A legal motion through which a person or entity who has not been named as a party to a case seeks to have the court order that they be made a party. 

stepping

noun
  • The act of taking a step. 

  • A specific iteration of a model of central processing unit, often distinguished by the addition or removal of features compared to earlier examples of the same processor, or the presence, or lack thereof, of specific bugs. 

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