Usage patterns
〈数〉メートル自由形the [distance]-meter freestyle (race)
He won the 100-meter freestyle.
自由形で泳ぐto swim (a race) in freestyle
She's good at swimming freestyle.
自由形の選手a freestyle swimmer
He's a freestyle swimmer on the Japanese national team.
自由形の世界記録the world record in freestyle
He broke the world record in freestyle.