The more votes a word gets, the higher the probability that it will show up in results.
Leon, I cast my vote in favor of when it's A Singular Noun A Plural Noun A Proper Noun An Adjective An Adverb A Transitive Verb with Singular Subject A Transitive Verb with Plural Subject An Intransitive Verb with Singular Subject An Intransitive Verb with Plural Subject Any Type (careful!)