58981 divided by 91 
The aim is to understand the frequency of 91 in 58981.

Moving on to step 1:
If we divide 5 by 91, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 91

Advancing to step 2:
If we divide 58 by 91, we get 0 and a remainder of 58.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 58, we get 58.
Append the next digit (9) from the dividend to 58 and continue with: 589 / 91

Step 3:
When dividing 589 by 91, we get 6 with a remainder of 43.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we take 546 away from 589, we end up with 43.
Fetch the next digit (8) from the dividend, attach it to 43 and continue: 438 / 91

Let's proceed to step 4:
The number 91 fits into 438 4 times, leaving a remainder of 74.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
The remainder is 74 after subtracting 364 from 438.
Bring next digit (1) of the dividend behind the 74 and repeat the process: 741 / 91

On to step 5:
741 divided by 91 is 8 with a remainder of 13.
The next digit of our result is 8. 
Result so far: 648.0
Subtracting 728 from 741 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 6:
If we divide 130 by 91, we get 1 and a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 648.1
The remainder is 39 after subtracting 91 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 7:
When dividing 390 by 91, we get 4 with a remainder of 26.
Write down 4 as next digit of the result. 
Result so far: 648.14
If we take 364 away from 390, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 8:
The number 91 fits into 260 2 times, leaving a remainder of 78.
The number 2 becomes the next digit in our result. 
Result so far: 648.142
Subtract 182 from 260 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 9:
The number 91 fits into 780 8 times, leaving a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 648.1428
If we take 728 away from 780, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 10:
The number 91 fits into 520 5 times, leaving a remainder of 65.
Write down 5 as next digit of the result. 
Result so far: 648.14285
If we subtract 455 from 520, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Step 11:
650 divided by 91 is 7 with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 648.142857
Deduct 637 from 650 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 12:
The number 91 fits into 130 1 times, leaving a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 648.1428571
Subtracting 91 from 130 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 13:
91 goes into 390 4 times with a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 648.14285714
The remainder is 26 after subtracting 364 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

The final outcome is 648.14285714, with a leftover of 2.6e-08.