We look at the division of 81961590 by 207 
The aim is to understand the frequency of 207 in 81961590.

On to step 1:
207 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 207

Going ahead to step 2:
If we divide 81 by 207, we get 0 and a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Take the next digit (9) from the dividend and append it to 81, then repeat: 819 / 207

Moving on to step 3:
207 can be fit into 819 3 times, resulting in a remainder of 198.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 621 from 819, we get 198.
Take the next digit (6) from the dividend and append it to 198, then repeat: 1986 / 207

Moving on to step 4:
207 goes into 1986 9 times with a remainder of 123.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
Deduct 1863 from 1986 and we're left with 123.
Take the next digit (1) from the dividend and append it to 123, then repeat: 1231 / 207

On to step 5:
When dividing 1231 by 207, we get 5 with a remainder of 196.
Put 5 as the next digit of the answer. 
Result so far: 395.0
If we subtract 1035 from 1231, we get 196.
Grab the next digit (5) from the dividend, add it to 196, then carry on: 1965 / 207

Let's proceed to step 6:
The number 207 fits into 1965 9 times, leaving a remainder of 102.
Put 9 as the next digit of the answer. 
Result so far: 3959.0
The remainder is 102 after subtracting 1863 from 1965.
Grab the next digit (9) from the dividend, add it to 102, then carry on: 1029 / 207

Advancing to step 7:
If we divide 1029 by 207, we get 4 and a remainder of 201.
The number 4 becomes the next digit in our result. 
Result so far: 39594.0
If we subtract 828 from 1029, we get 201.
Grab the next digit (0) from the dividend, add it to 201, then carry on: 2010 / 207

Step 8:
When dividing 2010 by 207, we get 9 with a remainder of 147.
The next digit of our result is 9. 
Result so far: 395949.0
Subtract 1863 from 2010 to get 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Going ahead to step 9:
The number 207 fits into 1470 7 times, leaving a remainder of 21.
Write down 7 as next digit of the result. 
Result so far: 395949.7
If we subtract 1449 from 1470, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 10:
The number 207 fits into 210 1 times, leaving a remainder of 3.
The next digit of our result is 1. 
Result so far: 395949.71
If we take 207 away from 210, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 11:
30 divided by 207 is 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 395949.71
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 12:
If we divide 300 by 207, we get 1 and a remainder of 93.
Put 1 as the next digit of the answer. 
Result so far: 395949.7101
Subtracting 207 from 300 leaves us with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Going ahead to step 13:
When dividing 930 by 207, we get 4 with a remainder of 102.
The number 4 becomes the next digit in our result. 
Result so far: 395949.71014
Subtract 828 from 930 to get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

On to step 14:
The number 207 fits into 1020 4 times, leaving a remainder of 192.
Record the quotient 4 as the next digit in the result. 
Result so far: 395949.710144
The remainder is 192 after subtracting 828 from 1020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

The final result is 395949.710144 with a remainder of 1.92e-05.