71863930 divided by 911 
The aim is to understand the frequency of 911 in 71863930.

On to step 1:
If we divide 7 by 911, we get 0 and 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.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 911

Moving on to step 2:
When dividing 71 by 911, we get 0 with a remainder of 71.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 71, we end up with 71.
Include the next digit (8) from the dividend after 71, then repeat: 718 / 911

Let's proceed to step 3:
718 divided by 911 is 0 with a remainder of 718.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 718 after subtracting 0 from 718.
Append the next digit (6) from the dividend to 718 and continue with: 7186 / 911

Moving on to step 4:
If we divide 7186 by 911, we get 7 and a remainder of 809.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we take 6377 away from 7186, we end up with 809.
Append the next digit (3) from the dividend to 809 and continue with: 8093 / 911

Let's proceed to step 5:
If we divide 8093 by 911, we get 8 and a remainder of 805.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
Subtracting 7288 from 8093 leaves us with 805.
Bring next digit (9) of the dividend behind the 805 and repeat the process: 8059 / 911

Going ahead to step 6:
The number 911 fits into 8059 8 times, leaving a remainder of 771.
Record the quotient 8 as the next digit in the result. 
Result so far: 788.0
Deduct 7288 from 8059 and we're left with 771.
Append the next digit (3) from the dividend to 771 and continue with: 7713 / 911

On to step 7:
7713 divided by 911 is 8 with a remainder of 425.
Write down 8 as next digit of the result. 
Result so far: 7888.0
If we take 7288 away from 7713, we end up with 425.
Include the next digit (0) from the dividend after 425, then repeat: 4250 / 911

Step 8:
4250 divided by 911 is 4 with a remainder of 606.
The next digit of our result is 4. 
Result so far: 78884.0
The remainder is 606 after subtracting 3644 from 4250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

On to step 9:
6060 divided by 911 is 6 with a remainder of 594.
Put 6 as the next digit of the answer. 
Result so far: 78884.6
If we subtract 5466 from 6060, we get 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

On to step 10:
5940 divided by 911 is 6 with a remainder of 474.
Record the quotient 6 as the next digit in the result. 
Result so far: 78884.66
If we take 5466 away from 5940, we end up with 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

The final outcome is 78884.66, with a leftover of 0.474.