Yes 40 is a prevalent number in The Scriptures. By the way it rained for 40 days but they were in the ark for 150. Last week I reviewed some material with some folks and the point to be made relied upon the usage of 30 day months. The flood story is one of those cases. It gives the time range in months and days covering 5 months and later in the same passage it refers to the same period as 150 days.
Yup woke up with that thought so I appreciate the correction. BTW Pentecost is on May 23, just say'n.