We look at the division of 98573696 by 810 
The aim is to understand the frequency of 810 in 98573696.

On to step 1:
If we divide 9 by 810, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 810

Going ahead to step 2:
810 goes into 98 0 times with a remainder of 98.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 98 leaves us with 98.
Grab the next digit (5) from the dividend, add it to 98, then carry on: 985 / 810

Advancing to step 3:
985 divided by 810 is 1 with a remainder of 175.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 175 after subtracting 810 from 985.
Bring next digit (7) of the dividend behind the 175 and repeat the process: 1757 / 810

Let's proceed to step 4:
810 can be fit into 1757 2 times, resulting in a remainder of 137.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
The remainder is 137 after subtracting 1620 from 1757.
Fetch the next digit (3) from the dividend, attach it to 137 and continue: 1373 / 810

Let's proceed to step 5:
If we divide 1373 by 810, we get 1 and a remainder of 563.
Record the quotient 1 as the next digit in the result. 
Result so far: 121.0
If we subtract 810 from 1373, we get 563.
Fetch the next digit (6) from the dividend, attach it to 563 and continue: 5636 / 810

Let's proceed to step 6:
The number 810 fits into 5636 6 times, leaving a remainder of 776.
Write down 6 as next digit of the result. 
Result so far: 1216.0
The remainder is 776 after subtracting 4860 from 5636.
Grab the next digit (9) from the dividend, add it to 776, then carry on: 7769 / 810

Going ahead to step 7:
7769 divided by 810 is 9 with a remainder of 479.
Put 9 as the next digit of the answer. 
Result so far: 12169.0
Subtracting 7290 from 7769 leaves us with 479.
Grab the next digit (6) from the dividend, add it to 479, then carry on: 4796 / 810

Moving on to step 8:
The number 810 fits into 4796 5 times, leaving a remainder of 746.
Use 5 as the next digit of our solution. 
Result so far: 121695.0
If we take 4050 away from 4796, we end up with 746.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7460, and continue the process.

On to step 9:
If we divide 7460 by 810, we get 9 and a remainder of 170.
Use 9 as the next digit of our solution. 
Result so far: 121695.9
If we take 7290 away from 7460, we end up with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

On to step 10:
When dividing 1700 by 810, we get 2 with a remainder of 80.
The next digit of our result is 2. 
Result so far: 121695.92
Subtract 1620 from 1700 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 11:
The number 810 fits into 800 0 times, leaving a remainder of 800.
The next digit of our result is 0. 
Result so far: 121695.92
Subtracting 0 from 800 leaves us with 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

Let's proceed to step 12:
The number 810 fits into 8000 9 times, leaving a remainder of 710.
The number 9 becomes the next digit in our result. 
Result so far: 121695.9209
If we take 7290 away from 8000, we end up with 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7100, and continue the process.

Advancing to step 13:
If we divide 7100 by 810, we get 8 and a remainder of 620.
Record the quotient 8 as the next digit in the result. 
Result so far: 121695.92098
Subtract 6480 from 7100 to get 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Step 14:
810 goes into 6200 7 times with a remainder of 530.
Write down 7 as next digit of the result. 
Result so far: 121695.920987
If we subtract 5670 from 6200, we get 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Going ahead to step 15:
810 goes into 5300 6 times with a remainder of 440.
The next digit of our result is 6. 
Result so far: 121695.9209876
Deduct 4860 from 5300 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Going ahead to step 16:
If we divide 4400 by 810, we get 5 and a remainder of 350.
Put 5 as the next digit of the answer. 
Result so far: 121695.92098765
Deduct 4050 from 4400 and we're left with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

In conclusion, the division gives 121695.92098765 with a balance of 3.5e-07.