We're dividing 72102929 by 628 
The aim is to understand the frequency of 628 in 72102929.

Step 1:
The number 628 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 628

Advancing to step 2:
628 can be fit into 72 0 times, resulting in a remainder of 72.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 72 and we're left with 72.
Grab the next digit (1) from the dividend, add it to 72, then carry on: 721 / 628

Moving on to step 3:
628 can be fit into 721 1 times, resulting in a remainder of 93.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 628 away from 721, we end up with 93.
Grab the next digit (0) from the dividend, add it to 93, then carry on: 930 / 628

Moving on to step 4:
628 goes into 930 1 times with a remainder of 302.
The next digit of our result is 1. 
Result so far: 11.0
The remainder is 302 after subtracting 628 from 930.
Append the next digit (2) from the dividend to 302 and continue with: 3022 / 628

On to step 5:
3022 divided by 628 is 4 with a remainder of 510.
The next digit of our result is 4. 
Result so far: 114.0
If we subtract 2512 from 3022, we get 510.
Take the next digit (9) from the dividend and append it to 510, then repeat: 5109 / 628

Moving on to step 6:
When dividing 5109 by 628, we get 8 with a remainder of 85.
Put 8 as the next digit of the answer. 
Result so far: 1148.0
If we take 5024 away from 5109, we end up with 85.
Grab the next digit (2) from the dividend, add it to 85, then carry on: 852 / 628

Let's proceed to step 7:
If we divide 852 by 628, we get 1 and a remainder of 224.
The number 1 becomes the next digit in our result. 
Result so far: 11481.0
If we take 628 away from 852, we end up with 224.
Take the next digit (9) from the dividend and append it to 224, then repeat: 2249 / 628

Let's proceed to step 8:
628 can be fit into 2249 3 times, resulting in a remainder of 365.
Record the quotient 3 as the next digit in the result. 
Result so far: 114813.0
If we subtract 1884 from 2249, we get 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Step 9:
The number 628 fits into 3650 5 times, leaving a remainder of 510.
Record the quotient 5 as the next digit in the result. 
Result so far: 114813.5
If we subtract 3140 from 3650, we get 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Advancing to step 10:
The number 628 fits into 5100 8 times, leaving a remainder of 76.
The next digit of our result is 8. 
Result so far: 114813.58
Deduct 5024 from 5100 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 11:
628 goes into 760 1 times with a remainder of 132.
Use 1 as the next digit of our solution. 
Result so far: 114813.581
If we subtract 628 from 760, we get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

On to step 12:
The number 628 fits into 1320 2 times, leaving a remainder of 64.
The next digit of our result is 2. 
Result so far: 114813.5812
The remainder is 64 after subtracting 1256 from 1320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 13:
640 divided by 628 is 1 with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 114813.58121
Deduct 628 from 640 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.

Advancing to step 14:
If we divide 120 by 628, we get 0 and a remainder of 120.
Use 0 as the next digit of our solution. 
Result so far: 114813.58121
If we subtract 0 from 120, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 15:
If we divide 1200 by 628, we get 1 and a remainder of 572.
The number 1 becomes the next digit in our result. 
Result so far: 114813.5812101
Subtracting 628 from 1200 leaves us with 572.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Step 16:
If we divide 5720 by 628, we get 9 and a remainder of 68.
Use 9 as the next digit of our solution. 
Result so far: 114813.58121019
The remainder is 68 after subtracting 5652 from 5720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

After the division, we end up with 114813.58121019 and a remainder of 6.8e-08.