Question

How often do neap tides occur?

Answer 1

Hint: Neap tides are moderate tides. They occur after seven days of a spring tide. The bulge of the ocean caused by the sun is cancelled out by the bulge of the ocean caused by the moon. This causes moderate tides known as neap tides.

Complete answer: Tides are waves of long periods. These are caused as the ocean is pulled by the gravitational pull of the moon and the gravitational pull of the sun when these bodies interact with the earth during their monthly and yearly orbits.
The sun, earth and moon is nearly in alignment during the full or new moon causing the average range of the tides slightly larger. This happens twice each month.
When the moon is directly between the sun and the earth, it is the new moon (moon appears dark). And when the earth is between the sun and the moon, it is full moon (moon appears full).
In each case, the oceans bulge a little more than usual as a consequence of the gravitational pull of the sun and the gravitational pull of the moon together on the earth. This led the high tides to rise little higher and the low tides little lower than average. These tides are called spring tides.
After seven days of a spring tide, the sun and the moon are at right angles to each other. The bulge of the ocean caused by the sun is cancelled out by the bulge of the ocean caused by the moon. This causes moderate tides known as neap tides.
Neap tides are produced in the first and third quarter of the moon. This means when the moon appears "half-full".

Note: Spring tide has nothing to do with the spring season. This term refers to the concept of the tide "springing forth". These tides occur twice each month. After seven days of which a neap tide occurs.