This is the 11096th most frequent Catalan word.
substitucions
"Substitucions" means "substitutions" in English.
Here, 'substitucions' is used to mean the act of substituting one teacher for another in a professional setting.
Les substitucions de mestres van ser anunciades al claustre.
The teacher substitutions were announced at the faculty meeting.
In this context, 'substitucions' refers to exchanges or replacements of players during a sports event.
Aquest jugador fa moltes substitucions durant el partit.
This player makes many substitutions during the game.
Here, 'substitucions' is used to describe replacing old objects (in this case, books) with new ones.