Let's divide 16630722 by 25
The aim is to understand the frequency of 25 in 16630722.

On to step 1:
25 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 25

Step 2:
25 goes into 16 0 times with a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Take the next digit (6) from the dividend and append it to 16, then repeat: 166 / 25

Going ahead to step 3:
25 can be fit into 166 6 times, resulting in a remainder of 16.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 150 from 166 to get 16.
Include the next digit (3) from the dividend after 16, then repeat: 163 / 25

Going ahead to step 4:
25 can be fit into 163 6 times, resulting in a remainder of 13.
Write down 6 as next digit of the result. 
Result so far: 66.0
The remainder is 13 after subtracting 150 from 163.
Grab the next digit (0) from the dividend, add it to 13, then carry on: 130 / 25

On to step 5:
25 can be fit into 130 5 times, resulting in a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 665.0
Deduct 125 from 130 and we're left with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 25

On to step 6:
If we divide 57 by 25, we get 2 and a remainder of 7.
Record the quotient 2 as the next digit in the result. 
Result so far: 6652.0
Deduct 50 from 57 and we're left with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 25

On to step 7:
If we divide 72 by 25, we get 2 and a remainder of 22.
The next digit of our result is 2. 
Result so far: 66522.0
The remainder is 22 after subtracting 50 from 72.
Bring next digit (2) of the dividend behind the 22 and repeat the process: 222 / 25

On to step 8:
The number 25 fits into 222 8 times, leaving a remainder of 22.
Record the quotient 8 as the next digit in the result. 
Result so far: 665228.0
The remainder is 22 after subtracting 200 from 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 9:
The number 25 fits into 220 8 times, leaving a remainder of 20.
Record the quotient 8 as the next digit in the result. 
Result so far: 665228.8
If we subtract 200 from 220, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 10:
25 can be fit into 200 8 times, resulting in a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 665228.88
The remainder is 0 after subtracting 200 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 665228.88 with a remaining 0.0.