We look at the division of 749808 by 77 
The aim is to understand the frequency of 77 in 749808.

Moving on to step 1:
77 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 77

Moving on to step 2:
If we divide 74 by 77, we get 0 and a remainder of 74.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 74, we end up with 74.
Grab the next digit (9) from the dividend, add it to 74, then carry on: 749 / 77

Step 3:
The number 77 fits into 749 9 times, leaving a remainder of 56.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 56 after subtracting 693 from 749.
Bring next digit (8) of the dividend behind the 56 and repeat the process: 568 / 77

Let's proceed to step 4:
77 can be fit into 568 7 times, resulting in a remainder of 29.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
Subtracting 539 from 568 leaves us with 29.
Append the next digit (0) from the dividend to 29 and continue with: 290 / 77

Moving on to step 5:
77 goes into 290 3 times with a remainder of 59.
Record the quotient 3 as the next digit in the result. 
Result so far: 973.0
Subtract 231 from 290 to get 59.
Grab the next digit (8) from the dividend, add it to 59, then carry on: 598 / 77

Advancing to step 6:
The number 77 fits into 598 7 times, leaving a remainder of 59.
Use 7 as the next digit of our solution. 
Result so far: 9737.0
Deduct 539 from 598 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 7:
The number 77 fits into 590 7 times, leaving a remainder of 51.
The number 7 becomes the next digit in our result. 
Result so far: 9737.7
The remainder is 51 after subtracting 539 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 8:
The number 77 fits into 510 6 times, leaving a remainder of 48.
The next digit of our result is 6. 
Result so far: 9737.76
If we take 462 away from 510, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 9:
If we divide 480 by 77, we get 6 and a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 9737.766
Subtract 462 from 480 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

After the division, we end up with 9737.766 and a remainder of 0.0018.