81147560 divided by 209 
The aim is to understand the frequency of 209 in 81147560.

Going ahead to step 1:
209 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 209

Going ahead to step 2:
209 can be fit into 81 0 times, resulting in a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Fetch the next digit (1) from the dividend, attach it to 81 and continue: 811 / 209

Moving on to step 3:
When dividing 811 by 209, we get 3 with a remainder of 184.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 627 from 811 and we're left with 184.
Take the next digit (4) from the dividend and append it to 184, then repeat: 1844 / 209

Advancing to step 4:
If we divide 1844 by 209, we get 8 and a remainder of 172.
Put 8 as the next digit of the answer. 
Result so far: 38.0
Subtracting 1672 from 1844 leaves us with 172.
Bring next digit (7) of the dividend behind the 172 and repeat the process: 1727 / 209

On to step 5:
If we divide 1727 by 209, we get 8 and a remainder of 55.
The next digit of our result is 8. 
Result so far: 388.0
The remainder is 55 after subtracting 1672 from 1727.
Grab the next digit (5) from the dividend, add it to 55, then carry on: 555 / 209

On to step 6:
209 can be fit into 555 2 times, resulting in a remainder of 137.
Put 2 as the next digit of the answer. 
Result so far: 3882.0
Subtracting 418 from 555 leaves us with 137.
Take the next digit (6) from the dividend and append it to 137, then repeat: 1376 / 209

Advancing to step 7:
1376 divided by 209 is 6 with a remainder of 122.
The number 6 becomes the next digit in our result. 
Result so far: 38826.0
Subtract 1254 from 1376 to get 122.
Bring next digit (0) of the dividend behind the 122 and repeat the process: 1220 / 209

Step 8:
When dividing 1220 by 209, we get 5 with a remainder of 175.
Put 5 as the next digit of the answer. 
Result so far: 388265.0
If we subtract 1045 from 1220, we get 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Moving on to step 9:
When dividing 1750 by 209, we get 8 with a remainder of 78.
Write down 8 as next digit of the result. 
Result so far: 388265.8
Subtracting 1672 from 1750 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 10:
If we divide 780 by 209, we get 3 and a remainder of 153.
Record the quotient 3 as the next digit in the result. 
Result so far: 388265.83
The remainder is 153 after subtracting 627 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

On to step 11:
209 can be fit into 1530 7 times, resulting in a remainder of 67.
Write down 7 as next digit of the result. 
Result so far: 388265.837
If we take 1463 away from 1530, 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.

Let's proceed to step 12:
209 can be fit into 670 3 times, resulting in a remainder of 43.
Write down 3 as next digit of the result. 
Result so far: 388265.8373
If we take 627 away from 670, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 13:
The number 209 fits into 430 2 times, leaving a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 388265.83732
Subtract 418 from 430 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 14:
209 goes into 120 0 times with a remainder of 120.
The number 0 becomes the next digit in our result. 
Result so far: 388265.83732
Deduct 0 from 120 and we're left with 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:
1200 divided by 209 is 5 with a remainder of 155.
The number 5 becomes the next digit in our result. 
Result so far: 388265.8373205
Subtract 1045 from 1200 to get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Let's proceed to step 16:
If we divide 1550 by 209, we get 7 and a remainder of 87.
Use 7 as the next digit of our solution. 
Result so far: 388265.83732057
Subtracting 1463 from 1550 leaves us with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

The final result is 388265.83732057 with a remainder of 8.7e-08.