This is the 307th most frequent Spanish word.
campo
"Campo" in Spanish means "countryside" or "field" in English.
In this sentence, 'campo' is used to refer to a physical open area or field where activities like playing sports take place.
Los niños jugaron fútbol en el campo.
The children played soccer on the field.
Here, 'campo' is used metaphorically to denote a particular area of study or expertise, in this case, medicine.
Ella se especializó en el campo de la medicina.
She specialized in the field of medicine.
In this usage, 'campo' refers to the rural or countryside area, often characterized by natural beauty and open spaces.