Good keyword phrases are specific and descriptive.
you repeat a word too many times, you are penalized for "spamming" or keyword stuffing.
you can get away with, and up to 3-7 times in your list of metatags
just put paragraph long particular keyword.you can increase the "weight" of the keyword you are emphasizing
For search engines that grade a keyword match by keyword proximity, the connected phrase ”bank usa” will outrank a citation that mentions ”bank newyark usa”, assuming that you are searching only for the phrase "bank usa ".