What is another word for low frequency?
Pronunciation: [lˈə͡ʊ fɹˈiːkwənsi] (IPA) 
Low frequency is a term used to describe sounds or events that occur at a lower rate than others. There are several synonyms for low frequency, each with its own unique emphasis. Some synonymous terms include infrequent, rare, uncommon, sporadic, and intermittent. Infrequent implies that something happens less often than normal or expected. Rare suggests an extremely unusual occurrence, while uncommon denotes something that is not frequently encountered. Sporadic indicates something that happens periodically or in scattered intervals. Intermittent refers to something that occurs at irregular intervals, with breaks in between. All in all, these synonyms can be used interchangeably, but with slight variations in meaning dependent on the context.
