Level III of XX on the frequency path
Frequency rank 318 / 2,608
Frequent enough that you will keep running into it once you read past headlines.
More common than 石 (Stone), less common than 朝 (Morning).
The character 工 (construction) looks like an I-beam — a flat top, vertical support, and flat base, the basic structure of all construction.
工 is rank 318 of 2,608 in published Japanese.
Study 工 →