el puesto / puesta (adjective, conjunction, noun)

Frequency star
  1. position, job, post
  2. stall, stand, booth (at a market)

Compramos aguacates baratos en un del mercado.

We bought cheap avocados at a market stall.

Avísame en cuanto vaque el de director del hospital.

Let me know as soon as the hospital director's post falls vacant.