We're dividing 78411977 by 766 
The aim is to understand the frequency of 766 in 78411977.

Let's proceed to step 1:
If we divide 7 by 766, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 766

Step 2:
When dividing 78 by 766, we get 0 with a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Bring next digit (4) of the dividend behind the 78 and repeat the process: 784 / 766

Step 3:
The number 766 fits into 784 1 times, leaving a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 766 from 784, we get 18.
Include the next digit (1) from the dividend after 18, then repeat: 181 / 766

Going ahead to step 4:
The number 766 fits into 181 0 times, leaving a remainder of 181.
The next digit of our result is 0. 
Result so far: 10.0
If we take 0 away from 181, we end up with 181.
Fetch the next digit (1) from the dividend, attach it to 181 and continue: 1811 / 766

On to step 5:
The number 766 fits into 1811 2 times, leaving a remainder of 279.
Record the quotient 2 as the next digit in the result. 
Result so far: 102.0
Deduct 1532 from 1811 and we're left with 279.
Include the next digit (9) from the dividend after 279, then repeat: 2799 / 766

Moving on to step 6:
When dividing 2799 by 766, we get 3 with a remainder of 501.
Record the quotient 3 as the next digit in the result. 
Result so far: 1023.0
Deduct 2298 from 2799 and we're left with 501.
Fetch the next digit (7) from the dividend, attach it to 501 and continue: 5017 / 766

On to step 7:
766 can be fit into 5017 6 times, resulting in a remainder of 421.
The number 6 becomes the next digit in our result. 
Result so far: 10236.0
Subtracting 4596 from 5017 leaves us with 421.
Take the next digit (7) from the dividend and append it to 421, then repeat: 4217 / 766

Going ahead to step 8:
If we divide 4217 by 766, we get 5 and a remainder of 387.
The next digit of our result is 5. 
Result so far: 102365.0
Subtract 3830 from 4217 to get 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

On to step 9:
When dividing 3870 by 766, we get 5 with a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 102365.5
Subtract 3830 from 3870 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
When dividing 400 by 766, we get 0 with a remainder of 400.
The number 0 becomes the next digit in our result. 
Result so far: 102365.5
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

On to step 11:
The number 766 fits into 4000 5 times, leaving a remainder of 170.
Use 5 as the next digit of our solution. 
Result so far: 102365.505
Subtract 3830 from 4000 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 12:
If we divide 1700 by 766, we get 2 and a remainder of 168.
Record the quotient 2 as the next digit in the result. 
Result so far: 102365.5052
If we subtract 1532 from 1700, we get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Moving on to step 13:
When dividing 1680 by 766, we get 2 with a remainder of 148.
Write down 2 as next digit of the result. 
Result so far: 102365.50522
Subtracting 1532 from 1680 leaves us with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

The final result is 102365.50522 with a remainder of 0.000148.