Formal:
* Chaque nuit (literally "each night") - This is the most common and formal way to say it.
* Tous les soirs (literally "every evening") - This is a more formal option that emphasizes the evening time.
Informal:
* Tous les nuits (literally "every night") - This is a more informal and less common way to say it.
* Chaque soir (literally "each evening") - This is a more informal option that emphasizes the evening time.
Example sentences:
* Je lis un livre chaque nuit. (I read a book every night.)
* Nous allons au cinéma tous les soirs. (We go to the cinema every evening.)
* Je rêve de toi toutes les nuits. (I dream about you every night.)
The best way to choose the right phrase depends on the formality of the situation and your personal preference.