We look at the division of 86712222 by 428 
The aim is to understand the frequency of 428 in 86712222.

Moving on to step 1:
When dividing 8 by 428, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 428

Step 2:
86 divided by 428 is 0 with a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Include the next digit (7) from the dividend after 86, then repeat: 867 / 428

Let's proceed to step 3:
428 can be fit into 867 2 times, resulting in a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 856 from 867 and we're left with 11.
Bring next digit (1) of the dividend behind the 11 and repeat the process: 111 / 428

On to step 4:
428 goes into 111 0 times with a remainder of 111.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
Deduct 0 from 111 and we're left with 111.
Grab the next digit (2) from the dividend, add it to 111, then carry on: 1112 / 428

Advancing to step 5:
428 goes into 1112 2 times with a remainder of 256.
Put 2 as the next digit of the answer. 
Result so far: 202.0
Deduct 856 from 1112 and we're left with 256.
Bring next digit (2) of the dividend behind the 256 and repeat the process: 2562 / 428

Let's proceed to step 6:
If we divide 2562 by 428, we get 5 and a remainder of 422.
The number 5 becomes the next digit in our result. 
Result so far: 2025.0
If we take 2140 away from 2562, we end up with 422.
Take the next digit (2) from the dividend and append it to 422, then repeat: 4222 / 428

Going ahead to step 7:
428 goes into 4222 9 times with a remainder of 370.
Write down 9 as next digit of the result. 
Result so far: 20259.0
If we subtract 3852 from 4222, we get 370.
Include the next digit (2) from the dividend after 370, then repeat: 3702 / 428

Let's proceed to step 8:
3702 divided by 428 is 8 with a remainder of 278.
Put 8 as the next digit of the answer. 
Result so far: 202598.0
Subtracting 3424 from 3702 leaves us with 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Step 9:
2780 divided by 428 is 6 with a remainder of 212.
Put 6 as the next digit of the answer. 
Result so far: 202598.6
If we take 2568 away from 2780, we end up with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Step 10:
2120 divided by 428 is 4 with a remainder of 408.
The number 4 becomes the next digit in our result. 
Result so far: 202598.64
The remainder is 408 after subtracting 1712 from 2120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Advancing to step 11:
When dividing 4080 by 428, we get 9 with a remainder of 228.
Write down 9 as next digit of the result. 
Result so far: 202598.649
If we take 3852 away from 4080, we end up with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Let's proceed to step 12:
2280 divided by 428 is 5 with a remainder of 140.
Put 5 as the next digit of the answer. 
Result so far: 202598.6495
Subtract 2140 from 2280 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 13:
The number 428 fits into 1400 3 times, leaving a remainder of 116.
Write down 3 as next digit of the result. 
Result so far: 202598.64953
Subtract 1284 from 1400 to get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

On to step 14:
1160 divided by 428 is 2 with a remainder of 304.
Use 2 as the next digit of our solution. 
Result so far: 202598.649532
If we take 856 away from 1160, we end up with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Going ahead to step 15:
The number 428 fits into 3040 7 times, leaving a remainder of 44.
Record the quotient 7 as the next digit in the result. 
Result so far: 202598.6495327
If we take 2996 away from 3040, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 16:
The number 428 fits into 440 1 times, leaving a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 202598.64953271
Deduct 428 from 440 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 202598.64953271, with a leftover of 1.2e-08.