We look at the division of 9581914 by 872 
The aim is to understand the frequency of 872 in 9581914.

On to step 1:
When dividing 9 by 872, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (5) from the dividend, attach it to 9 and continue: 95 / 872

On to step 2:
95 divided by 872 is 0 with a remainder of 95.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 95, we get 95.
Bring next digit (8) of the dividend behind the 95 and repeat the process: 958 / 872

Let's proceed to step 3:
If we divide 958 by 872, we get 1 and a remainder of 86.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 872 from 958 leaves us with 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 872

On to step 4:
861 divided by 872 is 0 with a remainder of 861.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we take 0 away from 861, we end up with 861.
Append the next digit (9) from the dividend to 861 and continue with: 8619 / 872

On to step 5:
The number 872 fits into 8619 9 times, leaving a remainder of 771.
The number 9 becomes the next digit in our result. 
Result so far: 109.0
If we subtract 7848 from 8619, we get 771.
Grab the next digit (1) from the dividend, add it to 771, then carry on: 7711 / 872

Let's proceed to step 6:
872 can be fit into 7711 8 times, resulting in a remainder of 735.
Use 8 as the next digit of our solution. 
Result so far: 1098.0
The remainder is 735 after subtracting 6976 from 7711.
Append the next digit (4) from the dividend to 735 and continue with: 7354 / 872

Step 7:
7354 divided by 872 is 8 with a remainder of 378.
Use 8 as the next digit of our solution. 
Result so far: 10988.0
Subtract 6976 from 7354 to get 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Moving on to step 8:
3780 divided by 872 is 4 with a remainder of 292.
Record the quotient 4 as the next digit in the result. 
Result so far: 10988.4
If we subtract 3488 from 3780, we get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Moving on to step 9:
872 can be fit into 2920 3 times, resulting in a remainder of 304.
The number 3 becomes the next digit in our result. 
Result so far: 10988.43
Subtract 2616 from 2920 to get 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Advancing to step 10:
872 goes into 3040 3 times with a remainder of 424.
Record the quotient 3 as the next digit in the result. 
Result so far: 10988.433
The remainder is 424 after subtracting 2616 from 3040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

The final outcome is 10988.433, with a leftover of 0.0424.