We're dividing 71218026 by 172 
The aim is to understand the frequency of 172 in 71218026.

Step 1:
When dividing 7 by 172, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 172

Step 2:
If we divide 71 by 172, we get 0 and a remainder of 71.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 71 after subtracting 0 from 71.
Include the next digit (2) from the dividend after 71, then repeat: 712 / 172

On to step 3:
172 goes into 712 4 times with a remainder of 24.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 688 from 712 leaves us with 24.
Append the next digit (1) from the dividend to 24 and continue with: 241 / 172

Going ahead to step 4:
When dividing 241 by 172, we get 1 with a remainder of 69.
Use 1 as the next digit of our solution. 
Result so far: 41.0
The remainder is 69 after subtracting 172 from 241.
Take the next digit (8) from the dividend and append it to 69, then repeat: 698 / 172

Let's proceed to step 5:
172 goes into 698 4 times with a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 414.0
Subtract 688 from 698 to get 10.
Append the next digit (0) from the dividend to 10 and continue with: 100 / 172

Let's proceed to step 6:
If we divide 100 by 172, we get 0 and a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 4140.0
If we subtract 0 from 100, we get 100.
Take the next digit (2) from the dividend and append it to 100, then repeat: 1002 / 172

Going ahead to step 7:
If we divide 1002 by 172, we get 5 and a remainder of 142.
The number 5 becomes the next digit in our result. 
Result so far: 41405.0
If we take 860 away from 1002, we end up with 142.
Include the next digit (6) from the dividend after 142, then repeat: 1426 / 172

Step 8:
The number 172 fits into 1426 8 times, leaving a remainder of 50.
Record the quotient 8 as the next digit in the result. 
Result so far: 414058.0
The remainder is 50 after subtracting 1376 from 1426.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 9:
If we divide 500 by 172, we get 2 and a remainder of 156.
The next digit of our result is 2. 
Result so far: 414058.2
Deduct 344 from 500 and we're left with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Going ahead to step 10:
172 goes into 1560 9 times with a remainder of 12.
Write down 9 as next digit of the result. 
Result so far: 414058.29
If we subtract 1548 from 1560, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 11:
172 can be fit into 120 0 times, resulting in a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 414058.29
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 12:
172 goes into 1200 6 times with a remainder of 168.
Put 6 as the next digit of the answer. 
Result so far: 414058.2906
If we take 1032 away from 1200, we end up with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Moving on to step 13:
The number 172 fits into 1680 9 times, leaving a remainder of 132.
The next digit of our result is 9. 
Result so far: 414058.29069
The remainder is 132 after subtracting 1548 from 1680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Moving on to step 14:
When dividing 1320 by 172, we get 7 with a remainder of 116.
Record the quotient 7 as the next digit in the result. 
Result so far: 414058.290697
The remainder is 116 after subtracting 1204 from 1320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Moving on to step 15:
If we divide 1160 by 172, we get 6 and a remainder of 128.
Put 6 as the next digit of the answer. 
Result so far: 414058.2906976
The remainder is 128 after subtracting 1032 from 1160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Moving on to step 16:
When dividing 1280 by 172, we get 7 with a remainder of 76.
Put 7 as the next digit of the answer. 
Result so far: 414058.29069767
The remainder is 76 after subtracting 1204 from 1280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The final outcome is 414058.29069767, with a leftover of 7.6e-08.