This is the 251st most frequent Swedish word.
april
April: The fourth month of the year in the Gregorian calendar.
Here, 'april' represents a time marker and occurs as part of a prepositional phrase indicating the time.
Vi planerar att resa till Stockholm i april.
We are planning to travel to Stockholm in April.
In this context, 'april' is used in a genitive construction with 'början av', signifying the time of an event.
Hon föddes i början av april.
She was born at the beginning of April.
In this sentence, 'April' is used as a proper noun, referring directly to the month.