Let's divide 99807889 by 172
The aim is to understand the frequency of 172 in 99807889.

On to step 1:
172 goes into 9 0 times with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 172

Step 2:
When dividing 99 by 172, we get 0 with a remainder of 99.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Take the next digit (8) from the dividend and append it to 99, then repeat: 998 / 172

Advancing to step 3:
172 can be fit into 998 5 times, resulting in a remainder of 138.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtracting 860 from 998 leaves us with 138.
Append the next digit (0) from the dividend to 138 and continue with: 1380 / 172

Let's proceed to step 4:
When dividing 1380 by 172, we get 8 with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 58.0
If we subtract 1376 from 1380, we get 4.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 172

Step 5:
172 goes into 47 0 times with a remainder of 47.
The number 0 becomes the next digit in our result. 
Result so far: 580.0
If we take 0 away from 47, we end up with 47.
Fetch the next digit (8) from the dividend, attach it to 47 and continue: 478 / 172

Let's proceed to step 6:
When dividing 478 by 172, we get 2 with a remainder of 134.
Record the quotient 2 as the next digit in the result. 
Result so far: 5802.0
If we subtract 344 from 478, we get 134.
Fetch the next digit (8) from the dividend, attach it to 134 and continue: 1348 / 172

On to step 7:
172 can be fit into 1348 7 times, resulting in a remainder of 144.
The number 7 becomes the next digit in our result. 
Result so far: 58027.0
If we take 1204 away from 1348, we end up with 144.
Append the next digit (9) from the dividend to 144 and continue with: 1449 / 172

Advancing to step 8:
172 goes into 1449 8 times with a remainder of 73.
Use 8 as the next digit of our solution. 
Result so far: 580278.0
The remainder is 73 after subtracting 1376 from 1449.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 9:
172 goes into 730 4 times with a remainder of 42.
The number 4 becomes the next digit in our result. 
Result so far: 580278.4
If we subtract 688 from 730, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 10:
172 goes into 420 2 times with a remainder of 76.
The number 2 becomes the next digit in our result. 
Result so far: 580278.42
Subtract 344 from 420 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 11:
The number 172 fits into 760 4 times, leaving a remainder of 72.
Use 4 as the next digit of our solution. 
Result so far: 580278.424
Subtract 688 from 760 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 12:
When dividing 720 by 172, we get 4 with a remainder of 32.
The next digit of our result is 4. 
Result so far: 580278.4244
Subtracting 688 from 720 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

After the division, we end up with 580278.4244 and a remainder of 0.00032.