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5.3. Peculiar Ways of Combining Parts of the Utterance
Asyndeton is connection between parts of a sentence or between sentences without any formal sign, when there is a deliberate omission of the connective conjunctions where it is generally expected to be according to the norms of the literary language.

E.g. Arthur looked at his watch; it was nine o’clock. (Voynich)

E.g. The policeman took no notice of them; his feet were planted apart on the strip of crimson carpet stretched across the pavement; his face, under the helmet, wore the same solid, watching look as theirs. (Galsworthy)
Polysyndeton is a SD of connecting words, sentences or phrases by using connective conjunctions.

E.g. The heaviest rain, and hail, and sleet, could boast of the advantage over him in only one respect. (Dickens)