Something that goes towards being frequent is something that is frequently happening.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you: Something that happens frequently is something that has really caught on. People want to do this thing frequently, because it is so chic (しき).
He repeatedly emphasized that both kids and adults can enjoy the Lion King show.