72916429 ÷ 171 
The aim is to understand the frequency of 171 in 72916429.

Let's proceed to step 1:
171 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 171

Moving on to step 2:
171 can be fit into 72 0 times, resulting in a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 72 to get 72.
Take the next digit (9) from the dividend and append it to 72, then repeat: 729 / 171

On to step 3:
729 divided by 171 is 4 with a remainder of 45.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 45 after subtracting 684 from 729.
Bring next digit (1) of the dividend behind the 45 and repeat the process: 451 / 171

Let's proceed to step 4:
451 divided by 171 is 2 with a remainder of 109.
Put 2 as the next digit of the answer. 
Result so far: 42.0
Subtracting 342 from 451 leaves us with 109.
Append the next digit (6) from the dividend to 109 and continue with: 1096 / 171

On to step 5:
When dividing 1096 by 171, we get 6 with a remainder of 70.
Record the quotient 6 as the next digit in the result. 
Result so far: 426.0
Deduct 1026 from 1096 and we're left with 70.
Append the next digit (4) from the dividend to 70 and continue with: 704 / 171

Moving on to step 6:
The number 171 fits into 704 4 times, leaving a remainder of 20.
The number 4 becomes the next digit in our result. 
Result so far: 4264.0
If we take 684 away from 704, we end up with 20.
Bring next digit (2) of the dividend behind the 20 and repeat the process: 202 / 171

On to step 7:
If we divide 202 by 171, we get 1 and a remainder of 31.
The next digit of our result is 1. 
Result so far: 42641.0
If we subtract 171 from 202, we get 31.
Grab the next digit (9) from the dividend, add it to 31, then carry on: 319 / 171

Advancing to step 8:
The number 171 fits into 319 1 times, leaving a remainder of 148.
Use 1 as the next digit of our solution. 
Result so far: 426411.0
Subtracting 171 from 319 leaves us with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Moving on to step 9:
If we divide 1480 by 171, we get 8 and a remainder of 112.
Use 8 as the next digit of our solution. 
Result so far: 426411.8
Subtract 1368 from 1480 to get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Step 10:
171 can be fit into 1120 6 times, resulting in a remainder of 94.
Put 6 as the next digit of the answer. 
Result so far: 426411.86
Deduct 1026 from 1120 and we're left with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Let's proceed to step 11:
171 goes into 940 5 times with a remainder of 85.
The number 5 becomes the next digit in our result. 
Result so far: 426411.865
Deduct 855 from 940 and we're left with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 12:
The number 171 fits into 850 4 times, leaving a remainder of 166.
The number 4 becomes the next digit in our result. 
Result so far: 426411.8654
Subtract 684 from 850 to get 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Advancing to step 13:
The number 171 fits into 1660 9 times, leaving a remainder of 121.
Put 9 as the next digit of the answer. 
Result so far: 426411.86549
If we take 1539 away from 1660, we end up with 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Advancing to step 14:
When dividing 1210 by 171, we get 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 426411.865497
The remainder is 13 after subtracting 1197 from 1210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 15:
171 goes into 130 0 times with a remainder of 130.
Put 0 as the next digit of the answer. 
Result so far: 426411.865497
Subtracting 0 from 130 leaves us with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Let's proceed to step 16:
1300 divided by 171 is 7 with a remainder of 103.
Use 7 as the next digit of our solution. 
Result so far: 426411.86549707
Subtract 1197 from 1300 to get 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

The final outcome is 426411.86549707, with a leftover of 1.03e-07.