Difference keyword and co-occurence

[seoanalytics]

Could someone explain me what the difference between a keyword and a co-occurence is ?

Thank you,

[TucsonAZWebDesign]

A Keyword is a word that a Website Owner/Marketer is attempting to rank in search engines for. The purpose of showing up at the top of results generally is motivated by money or financial gain.

Co-occurence is a term used to describe words that are closely related to a particular term or Keyword. For example these words are similar and thus considered to be closely related or a **Co-occurence **of an instrument:

• Guitar
• Surgeons Tools
• Violin
• Catalyst
• Flute

[seoanalytics]

Thank you that is getting a little more clear. From my understanding it is a bag a words that go together.