This study addresses a Many a NOUN construction, which seems superficially to show a mismatch between form and meaning, especially focusing on the singular and plural variants. The major goal of this study is to identify the syntactic and semantic properties of Many a NOUN construction by comparing it with the alternative constructions. This study performs a collostructional analysis to investigate whether this construction takes on a meaning (including function) of its own. The results of this study from the collostructional analysis reveal the three points. First, the Many a NOUN construction forms its own unique construction different from Many NOUNs, Much a NOUN and Much NOUN constructions. The predicates of Many a NOUN construction are not assigned any syntactic constraints. Thirdly, Many a NOUN construction has the words denoting time and abstract object with the strongest collostruction strength on the top positions. In addition, this study provides four different grammatical properties of the Many a NOUN construction. As for constituency, the noun must first combine with a determiner a(n) to form a noun phrase, and then this noun phrase can collocate with the quantifier many. The next issue is the agreement in number. The number agreement in this construction is basically determined by the noun. Thus, the quantifier many in this construction functions as a number-neutral quantifier. As a final result, the study suggests that the prototypical function of this construction is to count the frequency of entities, along with the constructional meaning of denoting a large indefinite quantity of entities.