This is the 6605th most frequent French word.
janet
"Janet" is not a French word; it is typically a proper noun, such as a name.
Here, 'Janet' is used as a proper noun referring to a person's name.
Janet joue au piano tous les week-ends.
Janet plays the piano every weekend.
In this sentence, 'Janet' again refers to a person's name, specifically the author mentioned.
Le livre écrit par Janet est devenu un best-seller.
The book written by Janet became a bestseller.
'Janet' here is used as a chosen name for the cat, demonstrating its application as a designation for a non-human entity.