15949998 ÷ 766 
The aim is to understand the frequency of 766 in 15949998.

Step 1:
766 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 766

On to step 2:
If we divide 15 by 766, we get 0 and a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 766

Let's proceed to step 3:
When dividing 159 by 766, we get 0 with a remainder of 159.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 159 and we're left with 159.
Grab the next digit (4) from the dividend, add it to 159, then carry on: 1594 / 766

On to step 4:
1594 divided by 766 is 2 with a remainder of 62.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 1532 from 1594, we get 62.
Grab the next digit (9) from the dividend, add it to 62, then carry on: 629 / 766

On to step 5:
When dividing 629 by 766, we get 0 with a remainder of 629.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Deduct 0 from 629 and we're left with 629.
Bring next digit (9) of the dividend behind the 629 and repeat the process: 6299 / 766

On to step 6:
If we divide 6299 by 766, we get 8 and a remainder of 171.
Write down 8 as next digit of the result. 
Result so far: 208.0
If we subtract 6128 from 6299, we get 171.
Fetch the next digit (9) from the dividend, attach it to 171 and continue: 1719 / 766

Going ahead to step 7:
The number 766 fits into 1719 2 times, leaving a remainder of 187.
The next digit of our result is 2. 
Result so far: 2082.0
Subtracting 1532 from 1719 leaves us with 187.
Include the next digit (8) from the dividend after 187, then repeat: 1878 / 766

Advancing to step 8:
766 goes into 1878 2 times with a remainder of 346.
Put 2 as the next digit of the answer. 
Result so far: 20822.0
Subtract 1532 from 1878 to get 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

On to step 9:
When dividing 3460 by 766, we get 4 with a remainder of 396.
Write down 4 as next digit of the result. 
Result so far: 20822.4
Subtracting 3064 from 3460 leaves us with 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Let's proceed to step 10:
The number 766 fits into 3960 5 times, leaving a remainder of 130.
Use 5 as the next digit of our solution. 
Result so far: 20822.45
If we take 3830 away from 3960, we end up with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Going ahead to step 11:
When dividing 1300 by 766, we get 1 with a remainder of 534.
The next digit of our result is 1. 
Result so far: 20822.451
The remainder is 534 after subtracting 766 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

On to step 12:
766 goes into 5340 6 times with a remainder of 744.
The number 6 becomes the next digit in our result. 
Result so far: 20822.4516
If we subtract 4596 from 5340, we get 744.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7440, and continue the process.

Moving on to step 13:
766 goes into 7440 9 times with a remainder of 546.
The number 9 becomes the next digit in our result. 
Result so far: 20822.45169
If we subtract 6894 from 7440, we get 546.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5460, and continue the process.

Moving on to step 14:
When dividing 5460 by 766, we get 7 with a remainder of 98.
Record the quotient 7 as the next digit in the result. 
Result so far: 20822.451697
Subtracting 5362 from 5460 leaves us with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Step 15:
980 divided by 766 is 1 with a remainder of 214.
Use 1 as the next digit of our solution. 
Result so far: 20822.4516971
If we take 766 away from 980, we end up with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Going ahead to step 16:
If we divide 2140 by 766, we get 2 and a remainder of 608.
The number 2 becomes the next digit in our result. 
Result so far: 20822.45169712
Subtracting 1532 from 2140 leaves us with 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

The final outcome is 20822.45169712, with a leftover of 6.08e-07.