We look at the division of 51658669 by 875 
The aim is to understand the frequency of 875 in 51658669.

On to step 1:
When dividing 5 by 875, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 875

Step 2:
875 can be fit into 51 0 times, resulting in a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Fetch the next digit (6) from the dividend, attach it to 51 and continue: 516 / 875

Moving on to step 3:
516 divided by 875 is 0 with a remainder of 516.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 516, we end up with 516.
Grab the next digit (5) from the dividend, add it to 516, then carry on: 5165 / 875

Advancing to step 4:
When dividing 5165 by 875, we get 5 with a remainder of 790.
The next digit of our result is 5. 
Result so far: 5.0
Subtract 4375 from 5165 to get 790.
Append the next digit (8) from the dividend to 790 and continue with: 7908 / 875

Step 5:
7908 divided by 875 is 9 with a remainder of 33.
The next digit of our result is 9. 
Result so far: 59.0
Subtracting 7875 from 7908 leaves us with 33.
Append the next digit (6) from the dividend to 33 and continue with: 336 / 875

Step 6:
875 can be fit into 336 0 times, resulting in a remainder of 336.
The next digit of our result is 0. 
Result so far: 590.0
If we take 0 away from 336, we end up with 336.
Bring next digit (6) of the dividend behind the 336 and repeat the process: 3366 / 875

Moving on to step 7:
If we divide 3366 by 875, we get 3 and a remainder of 741.
The number 3 becomes the next digit in our result. 
Result so far: 5903.0
Subtracting 2625 from 3366 leaves us with 741.
Take the next digit (9) from the dividend and append it to 741, then repeat: 7419 / 875

Going ahead to step 8:
875 can be fit into 7419 8 times, resulting in a remainder of 419.
The number 8 becomes the next digit in our result. 
Result so far: 59038.0
Subtracting 7000 from 7419 leaves us with 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

Moving on to step 9:
875 goes into 4190 4 times with a remainder of 690.
Record the quotient 4 as the next digit in the result. 
Result so far: 59038.4
Subtract 3500 from 4190 to get 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6900, and continue the process.

On to step 10:
When dividing 6900 by 875, we get 7 with a remainder of 775.
Use 7 as the next digit of our solution. 
Result so far: 59038.47
The remainder is 775 after subtracting 6125 from 6900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7750, and continue the process.

Let's proceed to step 11:
If we divide 7750 by 875, we get 8 and a remainder of 750.
Write down 8 as next digit of the result. 
Result so far: 59038.478
Subtract 7000 from 7750 to get 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

On to step 12:
875 can be fit into 7500 8 times, resulting in a remainder of 500.
Use 8 as the next digit of our solution. 
Result so far: 59038.4788
The remainder is 500 after subtracting 7000 from 7500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

The quotient of the division is 59038.4788, and the remainder is 0.005.