21975172 ÷ 860 
The aim is to understand the frequency of 860 in 21975172.

Advancing to step 1:
860 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 860

On to step 2:
When dividing 21 by 860, we get 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Grab the next digit (9) from the dividend, add it to 21, then carry on: 219 / 860

Advancing to step 3:
219 divided by 860 is 0 with a remainder of 219.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 219 and we're left with 219.
Take the next digit (7) from the dividend and append it to 219, then repeat: 2197 / 860

On to step 4:
When dividing 2197 by 860, we get 2 with a remainder of 477.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 1720 away from 2197, we end up with 477.
Fetch the next digit (5) from the dividend, attach it to 477 and continue: 4775 / 860

Moving on to step 5:
If we divide 4775 by 860, we get 5 and a remainder of 475.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Subtracting 4300 from 4775 leaves us with 475.
Grab the next digit (1) from the dividend, add it to 475, then carry on: 4751 / 860

Moving on to step 6:
4751 divided by 860 is 5 with a remainder of 451.
Record the quotient 5 as the next digit in the result. 
Result so far: 255.0
Subtracting 4300 from 4751 leaves us with 451.
Take the next digit (7) from the dividend and append it to 451, then repeat: 4517 / 860

Going ahead to step 7:
When dividing 4517 by 860, we get 5 with a remainder of 217.
Record the quotient 5 as the next digit in the result. 
Result so far: 2555.0
The remainder is 217 after subtracting 4300 from 4517.
Bring next digit (2) of the dividend behind the 217 and repeat the process: 2172 / 860

Let's proceed to step 8:
When dividing 2172 by 860, we get 2 with a remainder of 452.
Record the quotient 2 as the next digit in the result. 
Result so far: 25552.0
Deduct 1720 from 2172 and we're left with 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Advancing to step 9:
If we divide 4520 by 860, we get 5 and a remainder of 220.
Record the quotient 5 as the next digit in the result. 
Result so far: 25552.5
If we subtract 4300 from 4520, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Moving on to step 10:
If we divide 2200 by 860, we get 2 and a remainder of 480.
Put 2 as the next digit of the answer. 
Result so far: 25552.52
If we take 1720 away from 2200, we end up with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Advancing to step 11:
860 can be fit into 4800 5 times, resulting in a remainder of 500.
Write down 5 as next digit of the result. 
Result so far: 25552.525
Subtracting 4300 from 4800 leaves us with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Step 12:
The number 860 fits into 5000 5 times, leaving a remainder of 700.
The next digit of our result is 5. 
Result so far: 25552.5255
The remainder is 700 after subtracting 4300 from 5000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

The final outcome is 25552.5255, with a leftover of 0.007.