We look at the division of 81033798 by 766 
The aim is to understand the frequency of 766 in 81033798.

Advancing to step 1:
The number 766 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 766

On to step 2:
81 divided by 766 is 0 with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Grab the next digit (0) from the dividend, add it to 81, then carry on: 810 / 766

Moving on to step 3:
If we divide 810 by 766, we get 1 and a remainder of 44.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 766 from 810 leaves us with 44.
Append the next digit (3) from the dividend to 44 and continue with: 443 / 766

Let's proceed to step 4:
If we divide 443 by 766, we get 0 and a remainder of 443.
The next digit of our result is 0. 
Result so far: 10.0
If we subtract 0 from 443, we get 443.
Append the next digit (3) from the dividend to 443 and continue with: 4433 / 766

Advancing to step 5:
766 goes into 4433 5 times with a remainder of 603.
Record the quotient 5 as the next digit in the result. 
Result so far: 105.0
Subtracting 3830 from 4433 leaves us with 603.
Fetch the next digit (7) from the dividend, attach it to 603 and continue: 6037 / 766

Let's proceed to step 6:
6037 divided by 766 is 7 with a remainder of 675.
The next digit of our result is 7. 
Result so far: 1057.0
Deduct 5362 from 6037 and we're left with 675.
Take the next digit (9) from the dividend and append it to 675, then repeat: 6759 / 766

Let's proceed to step 7:
If we divide 6759 by 766, we get 8 and a remainder of 631.
The number 8 becomes the next digit in our result. 
Result so far: 10578.0
Subtract 6128 from 6759 to get 631.
Take the next digit (8) from the dividend and append it to 631, then repeat: 6318 / 766

Going ahead to step 8:
766 goes into 6318 8 times with a remainder of 190.
Put 8 as the next digit of the answer. 
Result so far: 105788.0
Subtract 6128 from 6318 to get 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 9:
When dividing 1900 by 766, we get 2 with a remainder of 368.
Record the quotient 2 as the next digit in the result. 
Result so far: 105788.2
Subtract 1532 from 1900 to get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Going ahead to step 10:
If we divide 3680 by 766, we get 4 and a remainder of 616.
Record the quotient 4 as the next digit in the result. 
Result so far: 105788.24
Deduct 3064 from 3680 and we're left with 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

On to step 11:
766 can be fit into 6160 8 times, resulting in a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 105788.248
Deduct 6128 from 6160 and we're left 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.

Going ahead to step 12:
766 goes into 320 0 times with a remainder of 320.
Use 0 as the next digit of our solution. 
Result so far: 105788.248
Subtracting 0 from 320 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 13:
766 can be fit into 3200 4 times, resulting in a remainder of 136.
Write down 4 as next digit of the result. 
Result so far: 105788.24804
Subtract 3064 from 3200 to get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Moving on to step 14:
The number 766 fits into 1360 1 times, leaving a remainder of 594.
Record the quotient 1 as the next digit in the result. 
Result so far: 105788.248041
The remainder is 594 after subtracting 766 from 1360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

Moving on to step 15:
If we divide 5940 by 766, we get 7 and a remainder of 578.
Put 7 as the next digit of the answer. 
Result so far: 105788.2480417
The remainder is 578 after subtracting 5362 from 5940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5780, and continue the process.

Let's proceed to step 16:
766 goes into 5780 7 times with a remainder of 418.
The number 7 becomes the next digit in our result. 
Result so far: 105788.24804177
Subtracting 5362 from 5780 leaves us with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

The final result is 105788.24804177 with a remainder of 4.18e-07.