odbywały

In a sentence

• Spotkania odbywały się co tydzień w sali konferencyjnej.

  The meetings took place every week in the conference room.

  In this sentence, 'odbywały' is used to indicate past continuous action, describing that events (meetings) were happening on a regular basis.

• Lekcje odbywały się po południu.

  The lessons were held in the afternoon.

  Here, 'odbywały' describes past recurring actions, specifically the timing of scheduled events (lessons).

• Ćwiczenia odbywały się w ogrodzie, gdy pogoda była ładna.

  The exercises took place in the garden when the weather was nice.

  This usage of 'odbywały' highlights past actions contingent on specific conditions, that is, exercises occurring outdoors depending on the weather.