We look at the division of 51450286 by 220 
The aim is to understand the frequency of 220 in 51450286.

On to step 1:
When dividing 5 by 220, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 220

On to step 2:
The number 220 fits into 51 0 times, leaving a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Append the next digit (4) from the dividend to 51 and continue with: 514 / 220

On to step 3:
If we divide 514 by 220, we get 2 and a remainder of 74.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 440 away from 514, we end up with 74.
Grab the next digit (5) from the dividend, add it to 74, then carry on: 745 / 220

Moving on to step 4:
220 can be fit into 745 3 times, resulting in a remainder of 85.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we subtract 660 from 745, we get 85.
Include the next digit (0) from the dividend after 85, then repeat: 850 / 220

Moving on to step 5:
The number 220 fits into 850 3 times, leaving a remainder of 190.
The next digit of our result is 3. 
Result so far: 233.0
If we take 660 away from 850, we end up with 190.
Take the next digit (2) from the dividend and append it to 190, then repeat: 1902 / 220

Moving on to step 6:
1902 divided by 220 is 8 with a remainder of 142.
The number 8 becomes the next digit in our result. 
Result so far: 2338.0
Subtract 1760 from 1902 to get 142.
Append the next digit (8) from the dividend to 142 and continue with: 1428 / 220

Advancing to step 7:
1428 divided by 220 is 6 with a remainder of 108.
Put 6 as the next digit of the answer. 
Result so far: 23386.0
Subtract 1320 from 1428 to get 108.
Append the next digit (6) from the dividend to 108 and continue with: 1086 / 220

Advancing to step 8:
When dividing 1086 by 220, we get 4 with a remainder of 206.
Use 4 as the next digit of our solution. 
Result so far: 233864.0
The remainder is 206 after subtracting 880 from 1086.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Going ahead to step 9:
220 can be fit into 2060 9 times, resulting in a remainder of 80.
The number 9 becomes the next digit in our result. 
Result so far: 233864.9
Deduct 1980 from 2060 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 10:
When dividing 800 by 220, we get 3 with a remainder of 140.
Put 3 as the next digit of the answer. 
Result so far: 233864.93
The remainder is 140 after subtracting 660 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

On to step 11:
220 goes into 1400 6 times with a remainder of 80.
The next digit of our result is 6. 
Result so far: 233864.936
Subtracting 1320 from 1400 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 12:
If we divide 800 by 220, we get 3 and a remainder of 140.
Put 3 as the next digit of the answer. 
Result so far: 233864.9363
Deduct 660 from 800 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 13:
220 can be fit into 1400 6 times, resulting in a remainder of 80.
Record the quotient 6 as the next digit in the result. 
Result so far: 233864.93636
Subtracting 1320 from 1400 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 14:
When dividing 800 by 220, we get 3 with a remainder of 140.
Use 3 as the next digit of our solution. 
Result so far: 233864.936363
If we subtract 660 from 800, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

On to step 15:
When dividing 1400 by 220, we get 6 with a remainder of 80.
Put 6 as the next digit of the answer. 
Result so far: 233864.9363636
Subtracting 1320 from 1400 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 16:
220 goes into 800 3 times with a remainder of 140.
Write down 3 as next digit of the result. 
Result so far: 233864.93636363
If we subtract 660 from 800, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The quotient of the division is 233864.93636363, and the remainder is 1.4e-07.