We look at the division of 77394207 by 791 
The aim is to understand the frequency of 791 in 77394207.

Let's proceed to step 1:
The number 791 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 791

Going ahead to step 2:
If we divide 77 by 791, we get 0 and a remainder of 77.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Append the next digit (3) from the dividend to 77 and continue with: 773 / 791

Let's proceed to step 3:
When dividing 773 by 791, we get 0 with a remainder of 773.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 773, we end up with 773.
Fetch the next digit (9) from the dividend, attach it to 773 and continue: 7739 / 791

Moving on to step 4:
791 goes into 7739 9 times with a remainder of 620.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 7119 from 7739 and we're left with 620.
Take the next digit (4) from the dividend and append it to 620, then repeat: 6204 / 791

On to step 5:
If we divide 6204 by 791, we get 7 and a remainder of 667.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
The remainder is 667 after subtracting 5537 from 6204.
Include the next digit (2) from the dividend after 667, then repeat: 6672 / 791

Moving on to step 6:
6672 divided by 791 is 8 with a remainder of 344.
The next digit of our result is 8. 
Result so far: 978.0
Subtract 6328 from 6672 to get 344.
Fetch the next digit (0) from the dividend, attach it to 344 and continue: 3440 / 791

Going ahead to step 7:
If we divide 3440 by 791, we get 4 and a remainder of 276.
Record the quotient 4 as the next digit in the result. 
Result so far: 9784.0
The remainder is 276 after subtracting 3164 from 3440.
Include the next digit (7) from the dividend after 276, then repeat: 2767 / 791

Moving on to step 8:
If we divide 2767 by 791, we get 3 and a remainder of 394.
Write down 3 as next digit of the result. 
Result so far: 97843.0
If we take 2373 away from 2767, we end up with 394.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

Moving on to step 9:
791 can be fit into 3940 4 times, resulting in a remainder of 776.
Record the quotient 4 as the next digit in the result. 
Result so far: 97843.4
Subtract 3164 from 3940 to get 776.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7760, and continue the process.

Step 10:
791 can be fit into 7760 9 times, resulting in a remainder of 641.
Use 9 as the next digit of our solution. 
Result so far: 97843.49
If we take 7119 away from 7760, we end up with 641.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6410, and continue the process.

Step 11:
If we divide 6410 by 791, we get 8 and a remainder of 82.
Write down 8 as next digit of the result. 
Result so far: 97843.498
If we subtract 6328 from 6410, we get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 12:
791 goes into 820 1 times with a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 97843.4981
Subtracting 791 from 820 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 13:
791 can be fit into 290 0 times, resulting in a remainder of 290.
Use 0 as the next digit of our solution. 
Result so far: 97843.4981
If we take 0 away from 290, we end up with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Going ahead to step 14:
The number 791 fits into 2900 3 times, leaving a remainder of 527.
Write down 3 as next digit of the result. 
Result so far: 97843.498103
If we take 2373 away from 2900, we end up with 527.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5270, and continue the process.

Let's proceed to step 15:
If we divide 5270 by 791, we get 6 and a remainder of 524.
Put 6 as the next digit of the answer. 
Result so far: 97843.4981036
Subtract 4746 from 5270 to get 524.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

Advancing to step 16:
791 can be fit into 5240 6 times, resulting in a remainder of 494.
The next digit of our result is 6. 
Result so far: 97843.49810366
Subtract 4746 from 5240 to get 494.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4940, and continue the process.

The final result is 97843.49810366 with a remainder of 4.94e-07.