an alphabetical list of words relating to a specific subject, text, or dialect.
Described either as a number or a percentage, it represents the frequency at which a keyword or a phrase should appear in the content of a webpage, in comparison to the total number of words on that page.
Formula to calculate keyword density is
Nkr = no. of times a specific keyword was repeated
Tkn = total no. of words in the text to be analysed
For determinig Keyword Phrase Density
Nwp = the no. of words in a specific phrase