This is more important than you know:
"According to the Oxford English Dictionary, the first recorded use of "employment" in the sense of "a person's work or occupation" dates back to 1776. However, it wasn't until the mid-19th century that the term gained widespread usage in this context...
In the United States, the Bureau of Labor Statistics (BLS) was established in 1884, and it began to collect and publish data on employment, unemployment, and labor markets. The BLS's use of the term "employment" in its reports and statistics helped to further popularize the concept and cement its place in modern language."
Pray tell, what is a worker?