Infrequencies refer to the state of being uncommon or rare. Therefore, antonyms for infrequencies would be words that describe a high occurrence or commonness. Such antonyms include frequent, regular, repeated, many, often, prevalent, usual, and typical. These words describe a pattern of occurrence or prevalence that is opposite to infrequency. For instance, if something is uncommon, its antonym would be common. Similarly, if an event occurs very rarely, its antonym would be to occur frequently. Hence, antonyms for infrequencies help to describe the opposite meaning and polarities of words and concepts in the English language.