event vs transaction

event

noun
  • A prearranged social activity (function, etc.) 

  • In the event, he turned out to have what I needed anyway. 

  • A point in spacetime having three spatial coordinates and one temporal coordinate. 

  • A possible action that the user can perform that is monitored by an application or the operating system (event listener). When an event occurs an event handler is called which performs a specific task. 

  • One of several contests that combine to make up a competition. 

  • An occurrence; something that happens. 

  • An end result; an outcome (now chiefly in phrases). 

  • A set of some of the possible outcomes; a subset of the sample space. 

  • An episode of severe health conditions. 

transaction

noun
  • A social interaction. 

  • A record of the proceedings of a learned society. 

  • An exchange or trade, as of ideas, money, goods, etc. 

  • A deal or business agreement. 

  • The act of conducting or carrying out (business, negotiations, plans). 

  • The transfer of funds into, out of, or from an account. 

  • An atomic operation; a message, data modification, or other procedure that is guaranteed to perform completely or not at all (e.g. a database transaction). 

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