955521 ÷ 20 
The aim is to understand the frequency of 20 in 955521.

Step 1:
20 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (5) from the dividend after 9, then repeat: 95 / 20

Moving on to step 2:
The number 20 fits into 95 4 times, leaving a remainder of 15.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 80 from 95 to get 15.
Grab the next digit (5) from the dividend, add it to 15, then carry on: 155 / 20

Moving on to step 3:
20 goes into 155 7 times with a remainder of 15.
Record the quotient 7 as the next digit in the result. 
Result so far: 47.0
The remainder is 15 after subtracting 140 from 155.
Append the next digit (5) from the dividend to 15 and continue with: 155 / 20

Going ahead to step 4:
155 divided by 20 is 7 with a remainder of 15.
Put 7 as the next digit of the answer. 
Result so far: 477.0
Deduct 140 from 155 and we're left with 15.
Grab the next digit (2) from the dividend, add it to 15, then carry on: 152 / 20

Step 5:
The number 20 fits into 152 7 times, leaving a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 4777.0
The remainder is 12 after subtracting 140 from 152.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 20

On to step 6:
20 can be fit into 121 6 times, resulting in a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 47776.0
Deduct 120 from 121 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
The number 20 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 47776.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
If we divide 100 by 20, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 47776.05
If we subtract 100 from 100, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 47776.05
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 47776.05
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 47776.05 with a remainder of 0.0.