We look at the division of 7120714 by 858 
The aim is to understand the frequency of 858 in 7120714.

Advancing to step 1:
The number 858 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Append the next digit (1) from the dividend to 7 and continue with: 71 / 858

Advancing to step 2:
When dividing 71 by 858, we get 0 with a remainder of 71.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 71 and we're left with 71.
Append the next digit (2) from the dividend to 71 and continue with: 712 / 858

Going ahead to step 3:
If we divide 712 by 858, we get 0 and a remainder of 712.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 712 and we're left with 712.
Bring next digit (0) of the dividend behind the 712 and repeat the process: 7120 / 858

Let's proceed to step 4:
When dividing 7120 by 858, we get 8 with a remainder of 256.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 256 after subtracting 6864 from 7120.
Fetch the next digit (7) from the dividend, attach it to 256 and continue: 2567 / 858

Moving on to step 5:
858 goes into 2567 2 times with a remainder of 851.
Put 2 as the next digit of the answer. 
Result so far: 82.0
The remainder is 851 after subtracting 1716 from 2567.
Append the next digit (1) from the dividend to 851 and continue with: 8511 / 858

Let's proceed to step 6:
When dividing 8511 by 858, we get 9 with a remainder of 789.
Put 9 as the next digit of the answer. 
Result so far: 829.0
The remainder is 789 after subtracting 7722 from 8511.
Fetch the next digit (4) from the dividend, attach it to 789 and continue: 7894 / 858

On to step 7:
858 goes into 7894 9 times with a remainder of 172.
The number 9 becomes the next digit in our result. 
Result so far: 8299.0
If we subtract 7722 from 7894, we get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Advancing to step 8:
858 goes into 1720 2 times with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 8299.2
Subtracting 1716 from 1720 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
The number 858 fits into 40 0 times, leaving a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 8299.2
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
When dividing 400 by 858, we get 0 with a remainder of 400.
The next digit of our result is 0. 
Result so far: 8299.2
Deduct 0 from 400 and we're left with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 8299.2, with a leftover of 0.04.