difference between keyword density and keyword proximity

Keyword Density is a measurement of a keyword that is a combination of a indexed word that keyword contained in it.Keyword proximity is all about the closeness between two or more keyword in a web page.

Keyword density refers to the number of times your keyword phrase appears on the page.

Keyword proximity is the combination of the density of a keyword and the prominence. Proximity is difficult to calculate when two or more keywords are used as keyword combination.

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Loss Assessors

Personal advice don't bother for any of this terms, keywords density have low impact with SERP.