58712971 ÷ 991 
The aim is to understand the frequency of 991 in 58712971.

On to step 1:
If we divide 5 by 991, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 991

Moving on to step 2:
When dividing 58 by 991, we get 0 with a remainder of 58.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 58, we get 58.
Append the next digit (7) from the dividend to 58 and continue with: 587 / 991

Advancing to step 3:
587 divided by 991 is 0 with a remainder of 587.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 587 after subtracting 0 from 587.
Include the next digit (1) from the dividend after 587, then repeat: 5871 / 991

Let's proceed to step 4:
5871 divided by 991 is 5 with a remainder of 916.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we subtract 4955 from 5871, we get 916.
Fetch the next digit (2) from the dividend, attach it to 916 and continue: 9162 / 991

Let's proceed to step 5:
When dividing 9162 by 991, we get 9 with a remainder of 243.
The number 9 becomes the next digit in our result. 
Result so far: 59.0
Deduct 8919 from 9162 and we're left with 243.
Bring next digit (9) of the dividend behind the 243 and repeat the process: 2439 / 991

Advancing to step 6:
If we divide 2439 by 991, we get 2 and a remainder of 457.
Put 2 as the next digit of the answer. 
Result so far: 592.0
If we subtract 1982 from 2439, we get 457.
Fetch the next digit (7) from the dividend, attach it to 457 and continue: 4577 / 991

Step 7:
If we divide 4577 by 991, we get 4 and a remainder of 613.
Use 4 as the next digit of our solution. 
Result so far: 5924.0
The remainder is 613 after subtracting 3964 from 4577.
Take the next digit (1) from the dividend and append it to 613, then repeat: 6131 / 991

Going ahead to step 8:
991 can be fit into 6131 6 times, resulting in a remainder of 185.
Put 6 as the next digit of the answer. 
Result so far: 59246.0
Subtract 5946 from 6131 to get 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Advancing to step 9:
When dividing 1850 by 991, we get 1 with a remainder of 859.
Write down 1 as next digit of the result. 
Result so far: 59246.1
Deduct 991 from 1850 and we're left with 859.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8590, and continue the process.

Going ahead to step 10:
If we divide 8590 by 991, we get 8 and a remainder of 662.
The next digit of our result is 8. 
Result so far: 59246.18
Subtracting 7928 from 8590 leaves us with 662.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6620, and continue the process.

Going ahead to step 11:
When dividing 6620 by 991, we get 6 with a remainder of 674.
The next digit of our result is 6. 
Result so far: 59246.186
If we take 5946 away from 6620, we end up with 674.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6740, and continue the process.

Let's proceed to step 12:
6740 divided by 991 is 6 with a remainder of 794.
The next digit of our result is 6. 
Result so far: 59246.1866
Deduct 5946 from 6740 and we're left with 794.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7940, and continue the process.

After the division, we end up with 59246.1866 and a remainder of 0.00794.