PUZZLE 170 Dragon Question

These animals all got together and counted up the number of something in their names.
The frog had one, the bird had four, and the rabbit had five.
How many did dragon have?
Touch the box to enter the number.

Hint 1

The appearance of the animals is not important.
It's just their names we are looking at.

Hint 2

Count the letters that appear in their names.

Hint 3

Continuing on from hint two...
The letter you should be counting is 'D'.

Super Hint

Sometimes letters can hide in other letters.
For example, 'B' contains two hidden 'D's.

Answer for 'Dragon Question'

The answer is '2'.