errand vs task

errand

noun
  • The purpose of such a journey. 

  • An oral message trusted to a person for delivery. 

  • A mundane mission of no great consequence, concerning household or business affairs (dropping items by, doing paperwork, going to a friend's house, etc.) 

verb
  • To send someone on an errand. 

  • To go on an errand. 

task

noun
  • An objective. 

  • Any piece of work done. 

  • A difficult or tedious undertaking. 

  • A process or execution of a program. 

  • A piece of work done as part of one’s duties. 

verb
  • To charge, as with a fault. 

  • To assign a task to, or impose a task on. 

  • To oppress with severe or excessive burdens; to tax 

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