Many is sometimes employed as a pronoun to refer to a considerable group of folks or factors. This is a fairly official use. several - a quantifier that may be utilized with depend nouns and is often preceded by `a'; a little but indefinite variety; "several months in the past"; https://juliuszgjno.blogginaway.com/37679757/top-how-many-times-has-manchester-city-won-the-premier-league-secrets