be up to vs experience

be up to

verb
  • To do or be involved in doing; to do (often something mischievous or inappropriate). 

  • To depend on, to be the choice of. 

experience

verb
  • To observe certain events; undergo a certain feeling or process; or perform certain actions that may alter one or contribute to one's knowledge, opinions, or skills. 

noun
  • A collection of events and/or activities from which an individual or group may gather knowledge, opinions, and skills. 

  • The knowledge thus gathered. 

  • The effect upon the judgment or feelings produced by any event, whether witnessed or participated in; personal and direct impressions as contrasted with description or fancies; personal acquaintance; actual enjoyment or suffering. 

  • An activity one has performed. 

How often have the words be up to and experience occurred in a corpus of books? (source: Google Ngram Viewer )