Let's divide 743998 by 77
The aim is to understand the frequency of 77 in 743998.

Advancing to step 1:
When dividing 7 by 77, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 77

Step 2:
77 goes into 74 0 times with a remainder of 74.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 74 after subtracting 0 from 74.
Grab the next digit (3) from the dividend, add it to 74, then carry on: 743 / 77

Step 3:
The number 77 fits into 743 9 times, leaving a remainder of 50.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtract 693 from 743 to get 50.
Include the next digit (9) from the dividend after 50, then repeat: 509 / 77

Let's proceed to step 4:
77 goes into 509 6 times with a remainder of 47.
Record the quotient 6 as the next digit in the result. 
Result so far: 96.0
Subtract 462 from 509 to get 47.
Append the next digit (9) from the dividend to 47 and continue with: 479 / 77

Step 5:
The number 77 fits into 479 6 times, leaving a remainder of 17.
Put 6 as the next digit of the answer. 
Result so far: 966.0
Subtract 462 from 479 to get 17.
Append the next digit (8) from the dividend to 17 and continue with: 178 / 77

Going ahead to step 6:
77 goes into 178 2 times with a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 9662.0
Subtract 154 from 178 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 7:
77 can be fit into 240 3 times, resulting in a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 9662.3
If we subtract 231 from 240, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 8:
77 goes into 90 1 times with a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 9662.31
The remainder is 13 after subtracting 77 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 9:
77 goes into 130 1 times with a remainder of 53.
Put 1 as the next digit of the answer. 
Result so far: 9662.311
Subtract 77 from 130 to get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

The final result is 9662.311 with a remainder of 0.0053.