We're dividing 28755678 by 858 
The aim is to understand the frequency of 858 in 28755678.

Step 1:
The number 858 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 858

Step 2:
858 can be fit into 28 0 times, resulting in a remainder of 28.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Fetch the next digit (7) from the dividend, attach it to 28 and continue: 287 / 858

Step 3:
287 divided by 858 is 0 with a remainder of 287.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 287 leaves us with 287.
Take the next digit (5) from the dividend and append it to 287, then repeat: 2875 / 858

Step 4:
2875 divided by 858 is 3 with a remainder of 301.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 2574 from 2875 to get 301.
Take the next digit (5) from the dividend and append it to 301, then repeat: 3015 / 858

On to step 5:
858 can be fit into 3015 3 times, resulting in a remainder of 441.
Write down 3 as next digit of the result. 
Result so far: 33.0
Subtract 2574 from 3015 to get 441.
Append the next digit (6) from the dividend to 441 and continue with: 4416 / 858

Let's proceed to step 6:
If we divide 4416 by 858, we get 5 and a remainder of 126.
The number 5 becomes the next digit in our result. 
Result so far: 335.0
If we subtract 4290 from 4416, we get 126.
Bring next digit (7) of the dividend behind the 126 and repeat the process: 1267 / 858

Going ahead to step 7:
When dividing 1267 by 858, we get 1 with a remainder of 409.
The next digit of our result is 1. 
Result so far: 3351.0
Subtract 858 from 1267 to get 409.
Include the next digit (8) from the dividend after 409, then repeat: 4098 / 858

Let's proceed to step 8:
If we divide 4098 by 858, we get 4 and a remainder of 666.
Use 4 as the next digit of our solution. 
Result so far: 33514.0
Subtract 3432 from 4098 to get 666.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6660, and continue the process.

Moving on to step 9:
If we divide 6660 by 858, we get 7 and a remainder of 654.
Record the quotient 7 as the next digit in the result. 
Result so far: 33514.7
Subtract 6006 from 6660 to get 654.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6540, and continue the process.

On to step 10:
The number 858 fits into 6540 7 times, leaving a remainder of 534.
The next digit of our result is 7. 
Result so far: 33514.77
The remainder is 534 after subtracting 6006 from 6540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

The final result is 33514.77 with a remainder of 0.534.