51803407 ÷ 655 
The aim is to understand the frequency of 655 in 51803407.

Moving on to step 1:
5 divided by 655 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 655

On to step 2:
When dividing 51 by 655, we get 0 with a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Grab the next digit (8) from the dividend, add it to 51, then carry on: 518 / 655

On to step 3:
655 can be fit into 518 0 times, resulting in a remainder of 518.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 518 leaves us with 518.
Grab the next digit (0) from the dividend, add it to 518, then carry on: 5180 / 655

Moving on to step 4:
When dividing 5180 by 655, we get 7 with a remainder of 595.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we take 4585 away from 5180, we end up with 595.
Take the next digit (3) from the dividend and append it to 595, then repeat: 5953 / 655

Advancing to step 5:
If we divide 5953 by 655, we get 9 and a remainder of 58.
The number 9 becomes the next digit in our result. 
Result so far: 79.0
Subtract 5895 from 5953 to get 58.
Append the next digit (4) from the dividend to 58 and continue with: 584 / 655

Step 6:
655 can be fit into 584 0 times, resulting in a remainder of 584.
Use 0 as the next digit of our solution. 
Result so far: 790.0
Deduct 0 from 584 and we're left with 584.
Bring next digit (0) of the dividend behind the 584 and repeat the process: 5840 / 655

Step 7:
If we divide 5840 by 655, we get 8 and a remainder of 600.
Write down 8 as next digit of the result. 
Result so far: 7908.0
Deduct 5240 from 5840 and we're left with 600.
Append the next digit (7) from the dividend to 600 and continue with: 6007 / 655

Advancing to step 8:
6007 divided by 655 is 9 with a remainder of 112.
Write down 9 as next digit of the result. 
Result so far: 79089.0
The remainder is 112 after subtracting 5895 from 6007.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Going ahead to step 9:
When dividing 1120 by 655, we get 1 with a remainder of 465.
Use 1 as the next digit of our solution. 
Result so far: 79089.1
If we take 655 away from 1120, we end up with 465.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4650, and continue the process.

On to step 10:
The number 655 fits into 4650 7 times, leaving a remainder of 65.
Write down 7 as next digit of the result. 
Result so far: 79089.17
If we subtract 4585 from 4650, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 11:
If we divide 650 by 655, we get 0 and a remainder of 650.
Record the quotient 0 as the next digit in the result. 
Result so far: 79089.17
If we take 0 away from 650, we end up with 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

On to step 12:
655 can be fit into 6500 9 times, resulting in a remainder of 605.
Use 9 as the next digit of our solution. 
Result so far: 79089.1709
Subtract 5895 from 6500 to get 605.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6050, and continue the process.

Going ahead to step 13:
6050 divided by 655 is 9 with a remainder of 155.
Record the quotient 9 as the next digit in the result. 
Result so far: 79089.17099
If we take 5895 away from 6050, we end up with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

The final outcome is 79089.17099, with a leftover of 0.000155.