500
The Greek god of opportunity, the youngest son of Zeus was always depicted as running, with an odd lock of hair on his forehead that one could grab onto and thus "seize the moment of opportunity".
Who is Kairos?
(In the myth, if you missed the god as he ran by, you missed the opportunity. Similarly, when speaking, English or another language, you only have one opportunity to make it count. Could this make it difficult for non native speakers in the US to get a job?