We look at the division of 89398579 by 807 
The aim is to understand the frequency of 807 in 89398579.

Going ahead to step 1:
If we divide 8 by 807, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 807

On to step 2:
807 can be fit into 89 0 times, resulting in a remainder of 89.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 89, we get 89.
Take the next digit (3) from the dividend and append it to 89, then repeat: 893 / 807

On to step 3:
807 goes into 893 1 times with a remainder of 86.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 807 from 893, we get 86.
Include the next digit (9) from the dividend after 86, then repeat: 869 / 807

Moving on to step 4:
869 divided by 807 is 1 with a remainder of 62.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtracting 807 from 869 leaves us with 62.
Fetch the next digit (8) from the dividend, attach it to 62 and continue: 628 / 807

On to step 5:
807 goes into 628 0 times with a remainder of 628.
Write down 0 as next digit of the result. 
Result so far: 110.0
If we subtract 0 from 628, we get 628.
Fetch the next digit (5) from the dividend, attach it to 628 and continue: 6285 / 807

Let's proceed to step 6:
6285 divided by 807 is 7 with a remainder of 636.
Write down 7 as next digit of the result. 
Result so far: 1107.0
If we subtract 5649 from 6285, we get 636.
Fetch the next digit (7) from the dividend, attach it to 636 and continue: 6367 / 807

On to step 7:
807 can be fit into 6367 7 times, resulting in a remainder of 718.
The number 7 becomes the next digit in our result. 
Result so far: 11077.0
Subtract 5649 from 6367 to get 718.
Bring next digit (9) of the dividend behind the 718 and repeat the process: 7189 / 807

Going ahead to step 8:
The number 807 fits into 7189 8 times, leaving a remainder of 733.
Write down 8 as next digit of the result. 
Result so far: 110778.0
The remainder is 733 after subtracting 6456 from 7189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7330, and continue the process.

On to step 9:
807 can be fit into 7330 9 times, resulting in a remainder of 67.
Record the quotient 9 as the next digit in the result. 
Result so far: 110778.9
If we take 7263 away from 7330, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 10:
670 divided by 807 is 0 with a remainder of 670.
Write down 0 as next digit of the result. 
Result so far: 110778.9
The remainder is 670 after subtracting 0 from 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6700, and continue the process.

Going ahead to step 11:
6700 divided by 807 is 8 with a remainder of 244.
Use 8 as the next digit of our solution. 
Result so far: 110778.908
The remainder is 244 after subtracting 6456 from 6700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Advancing to step 12:
The number 807 fits into 2440 3 times, leaving a remainder of 19.
The next digit of our result is 3. 
Result so far: 110778.9083
Subtracting 2421 from 2440 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 13:
807 goes into 190 0 times with a remainder of 190.
Use 0 as the next digit of our solution. 
Result so far: 110778.9083
The remainder is 190 after subtracting 0 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Moving on to step 14:
If we divide 1900 by 807, we get 2 and a remainder of 286.
The number 2 becomes the next digit in our result. 
Result so far: 110778.908302
Subtract 1614 from 1900 to get 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Let's proceed to step 15:
When dividing 2860 by 807, we get 3 with a remainder of 439.
The next digit of our result is 3. 
Result so far: 110778.9083023
If we subtract 2421 from 2860, we get 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

On to step 16:
807 goes into 4390 5 times with a remainder of 355.
Record the quotient 5 as the next digit in the result. 
Result so far: 110778.90830235
If we subtract 4035 from 4390, we get 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

The final outcome is 110778.90830235, with a leftover of 3.55e-07.