The most frequently used words are known as Core Vocabulary words. Approximately 80% of the words spoken are from a small set of 350 words which are mostly pronouns, verbs, prepositions, conjunctions, adjectives, and adverbs. They are usually not nouns.

Focus instruction on teaching core vocabulary words by modeling their use.

It may take some time for a child to learn how to use these words. The child will likely need to experience these words being modeled many, many times before using it on the AAC independently. This video provides an explanation with examples: