'Months' in the Bible

In which time Moses was born, and was exceeding fair, and nourished up in his father's house three months:

And he continued there a year and six months, teaching the word of God among them.

And he went into the synagogue, and spake boldly for the space of three months, disputing and persuading the things concerning the kingdom of God.

And there abode three months. And when the Jews laid wait for him, as he was about to sail into Syria, he purposed to return through Macedonia.

And after three months we departed in a ship of Alexandria, which had wintered in the isle, whose sign was Castor and Pollux.