We're dividing 86172225 by 258 
The aim is to understand the frequency of 258 in 86172225.

Moving on to step 1:
258 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 258

Going ahead to step 2:
258 can be fit into 86 0 times, resulting in a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 258

Advancing to step 3:
If we divide 861 by 258, we get 3 and a remainder of 87.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 87 after subtracting 774 from 861.
Grab the next digit (7) from the dividend, add it to 87, then carry on: 877 / 258

Advancing to step 4:
258 goes into 877 3 times with a remainder of 103.
Put 3 as the next digit of the answer. 
Result so far: 33.0
If we take 774 away from 877, we end up with 103.
Fetch the next digit (2) from the dividend, attach it to 103 and continue: 1032 / 258

Moving on to step 5:
When dividing 1032 by 258, we get 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 334.0
Subtract 1032 from 1032 to get 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 258

Moving on to step 6:
If we divide 2 by 258, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 3340.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 258

Let's proceed to step 7:
If we divide 22 by 258, we get 0 and a remainder of 22.
The number 0 becomes the next digit in our result. 
Result so far: 33400.0
Deduct 0 from 22 and we're left with 22.
Include the next digit (5) from the dividend after 22, then repeat: 225 / 258

Moving on to step 8:
When dividing 225 by 258, we get 0 with a remainder of 225.
Record the quotient 0 as the next digit in the result. 
Result so far: 334000.0
The remainder is 225 after subtracting 0 from 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Going ahead to step 9:
2250 divided by 258 is 8 with a remainder of 186.
The number 8 becomes the next digit in our result. 
Result so far: 334000.8
Subtract 2064 from 2250 to get 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Step 10:
258 goes into 1860 7 times with a remainder of 54.
The next digit of our result is 7. 
Result so far: 334000.87
If we take 1806 away from 1860, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 11:
258 can be fit into 540 2 times, resulting in a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 334000.872
Subtract 516 from 540 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 12:
258 goes into 240 0 times with a remainder of 240.
Record the quotient 0 as the next digit in the result. 
Result so far: 334000.872
Subtract 0 from 240 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Moving on to step 13:
If we divide 2400 by 258, we get 9 and a remainder of 78.
Record the quotient 9 as the next digit in the result. 
Result so far: 334000.87209
If we subtract 2322 from 2400, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 14:
If we divide 780 by 258, we get 3 and a remainder of 6.
The next digit of our result is 3. 
Result so far: 334000.872093
If we subtract 774 from 780, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 15:
258 can be fit into 60 0 times, resulting in a remainder of 60.
The next digit of our result is 0. 
Result so far: 334000.872093
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 16:
600 divided by 258 is 2 with a remainder of 84.
Put 2 as the next digit of the answer. 
Result so far: 334000.87209302
If we subtract 516 from 600, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

The final result is 334000.87209302 with a remainder of 8.4e-08.