We look at the division of 75907439 by 77 
The aim is to understand the frequency of 77 in 75907439.

Step 1:
The number 77 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 77

Let's proceed to step 2:
The number 77 fits into 75 0 times, leaving a remainder of 75.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 75, we end up with 75.
Fetch the next digit (9) from the dividend, attach it to 75 and continue: 759 / 77

Advancing to step 3:
77 goes into 759 9 times with a remainder of 66.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 693 from 759 and we're left with 66.
Grab the next digit (0) from the dividend, add it to 66, then carry on: 660 / 77

Advancing to step 4:
When dividing 660 by 77, we get 8 with a remainder of 44.
The next digit of our result is 8. 
Result so far: 98.0
If we take 616 away from 660, we end up with 44.
Take the next digit (7) from the dividend and append it to 44, then repeat: 447 / 77

Step 5:
If we divide 447 by 77, we get 5 and a remainder of 62.
Write down 5 as next digit of the result. 
Result so far: 985.0
If we subtract 385 from 447, we get 62.
Take the next digit (4) from the dividend and append it to 62, then repeat: 624 / 77

Going ahead to step 6:
77 goes into 624 8 times with a remainder of 8.
The next digit of our result is 8. 
Result so far: 9858.0
If we take 616 away from 624, we end up with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 77

Going ahead to step 7:
77 can be fit into 83 1 times, resulting in a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 98581.0
The remainder is 6 after subtracting 77 from 83.
Include the next digit (9) from the dividend after 6, then repeat: 69 / 77

Step 8:
77 can be fit into 69 0 times, resulting in a remainder of 69.
Record the quotient 0 as the next digit in the result. 
Result so far: 985810.0
Subtracting 0 from 69 leaves us with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Let's proceed to step 9:
77 can be fit into 690 8 times, resulting in a remainder of 74.
Record the quotient 8 as the next digit in the result. 
Result so far: 985810.8
Subtract 616 from 690 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 10:
77 goes into 740 9 times with a remainder of 47.
Record the quotient 9 as the next digit in the result. 
Result so far: 985810.89
Subtracting 693 from 740 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 11:
77 can be fit into 470 6 times, resulting in a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 985810.896
Subtract 462 from 470 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 12:
80 divided by 77 is 1 with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 985810.8961
If we take 77 away from 80, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 13:
When dividing 30 by 77, we get 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 985810.8961
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 14:
77 goes into 300 3 times with a remainder of 69.
Record the quotient 3 as the next digit in the result. 
Result so far: 985810.896103
Subtract 231 from 300 to get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Advancing to step 15:
The number 77 fits into 690 8 times, leaving a remainder of 74.
The next digit of our result is 8. 
Result so far: 985810.8961038
If we take 616 away from 690, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 16:
If we divide 740 by 77, we get 9 and a remainder of 47.
The next digit of our result is 9. 
Result so far: 985810.89610389
If we subtract 693 from 740, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

After the division, we end up with 985810.89610389 and a remainder of 4.7e-08.