attend vs tend

attend

verb
  • To wait upon as a servant etc.; to accompany to assist (someone). 

  • To be present with; to accompany; to be united or consequent to. 

  • To be present at (an event or place) in order to take part in some action or proceedings; to regularly go to (an event or place). 

  • To turn one's consideration (to); to deal with (a task, problem, concern etc.), to look after. 

  • To wait for; to await; to remain, abide, or be in store for. 

  • To go to (a place) for some purpose (with at). 

tend

verb
  • To wait (upon), as attendants or servants; to serve; to attend. 

  • To be likely, or probable to do something, or to have a certain habit or leaning. 

  • To accompany as an assistant or protector; to care for the wants of; to look after; to watch; to guard. 

  • To kindle; ignite; set on fire; light; inflame; burn. 

  • To look after (e.g. an ill person.) 

  • To contribute to or toward some outcome. 

  • To manage (an anchored vessel) when the tide turns, to prevent it from entangling the cable when swinging. 

  • To make a tender of; to offer or tender. 

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