One word or two? Plural and singular- It matters in SEO

For beginners in SEO it can be hard to know if the terms you are trying to rank for will have different results when used singular and for the plural, or for the two word version of a phrase. Well the answer is yes, it does matter. Remember, computer code and algorithms use exact series of symbols, to a human being the plural is almost the same word, even more of that word. But to a computer it is a completely different word, like the difference between "for" and "fort" or the number "328" and "3284"; big differences. One can also view a different amount of searches for a term in its singular and its plural using Google's term tool. Check out this real life example I graphed of the multiple rankings for pluralized terms and split phrases.