75286785 ÷ 771 
The aim is to understand the frequency of 771 in 75286785.

On to step 1:
The number 771 fits into 7 0 times, leaving 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.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 771

Step 2:
771 goes into 75 0 times with a remainder of 75.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 75, we get 75.
Include the next digit (2) from the dividend after 75, then repeat: 752 / 771

Advancing to step 3:
The number 771 fits into 752 0 times, leaving a remainder of 752.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 752, we end up with 752.
Fetch the next digit (8) from the dividend, attach it to 752 and continue: 7528 / 771

Advancing to step 4:
When dividing 7528 by 771, we get 9 with a remainder of 589.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we subtract 6939 from 7528, we get 589.
Take the next digit (6) from the dividend and append it to 589, then repeat: 5896 / 771

Let's proceed to step 5:
The number 771 fits into 5896 7 times, leaving a remainder of 499.
Record the quotient 7 as the next digit in the result. 
Result so far: 97.0
Deduct 5397 from 5896 and we're left with 499.
Fetch the next digit (7) from the dividend, attach it to 499 and continue: 4997 / 771

Moving on to step 6:
The number 771 fits into 4997 6 times, leaving a remainder of 371.
Record the quotient 6 as the next digit in the result. 
Result so far: 976.0
Subtract 4626 from 4997 to get 371.
Include the next digit (8) from the dividend after 371, then repeat: 3718 / 771

Advancing to step 7:
If we divide 3718 by 771, we get 4 and a remainder of 634.
The next digit of our result is 4. 
Result so far: 9764.0
If we subtract 3084 from 3718, we get 634.
Append the next digit (5) from the dividend to 634 and continue with: 6345 / 771

Advancing to step 8:
If we divide 6345 by 771, we get 8 and a remainder of 177.
Put 8 as the next digit of the answer. 
Result so far: 97648.0
Subtracting 6168 from 6345 leaves us with 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Going ahead to step 9:
771 goes into 1770 2 times with a remainder of 228.
Put 2 as the next digit of the answer. 
Result so far: 97648.2
Subtracting 1542 from 1770 leaves us with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Step 10:
2280 divided by 771 is 2 with a remainder of 738.
The next digit of our result is 2. 
Result so far: 97648.22
Deduct 1542 from 2280 and we're left with 738.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7380, and continue the process.

The final result is 97648.22 with a remainder of 0.738.