91133999 ÷ 580 
The aim is to understand the frequency of 580 in 91133999.

Going ahead to step 1:
If we divide 9 by 580, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 580

Let's proceed to step 2:
580 goes into 91 0 times with a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Append the next digit (1) from the dividend to 91 and continue with: 911 / 580

On to step 3:
580 goes into 911 1 times with a remainder of 331.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 580 from 911 leaves us with 331.
Append the next digit (3) from the dividend to 331 and continue with: 3313 / 580

Step 4:
580 can be fit into 3313 5 times, resulting in a remainder of 413.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Deduct 2900 from 3313 and we're left with 413.
Bring next digit (3) of the dividend behind the 413 and repeat the process: 4133 / 580

Moving on to step 5:
When dividing 4133 by 580, we get 7 with a remainder of 73.
The next digit of our result is 7. 
Result so far: 157.0
If we take 4060 away from 4133, we end up with 73.
Include the next digit (9) from the dividend after 73, then repeat: 739 / 580

Moving on to step 6:
When dividing 739 by 580, we get 1 with a remainder of 159.
The next digit of our result is 1. 
Result so far: 1571.0
Subtract 580 from 739 to get 159.
Include the next digit (9) from the dividend after 159, then repeat: 1599 / 580

Let's proceed to step 7:
If we divide 1599 by 580, we get 2 and a remainder of 439.
Write down 2 as next digit of the result. 
Result so far: 15712.0
Subtract 1160 from 1599 to get 439.
Append the next digit (9) from the dividend to 439 and continue with: 4399 / 580

Let's proceed to step 8:
580 goes into 4399 7 times with a remainder of 339.
Put 7 as the next digit of the answer. 
Result so far: 157127.0
Subtract 4060 from 4399 to get 339.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3390, and continue the process.

Advancing to step 9:
580 goes into 3390 5 times with a remainder of 490.
Put 5 as the next digit of the answer. 
Result so far: 157127.5
Deduct 2900 from 3390 and we're left with 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Moving on to step 10:
4900 divided by 580 is 8 with a remainder of 260.
The number 8 becomes the next digit in our result. 
Result so far: 157127.58
If we take 4640 away from 4900, we end up with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 11:
580 goes into 2600 4 times with a remainder of 280.
Put 4 as the next digit of the answer. 
Result so far: 157127.584
Subtracting 2320 from 2600 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Advancing to step 12:
580 goes into 2800 4 times with a remainder of 480.
The number 4 becomes the next digit in our result. 
Result so far: 157127.5844
Deduct 2320 from 2800 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

The quotient of the division is 157127.5844, and the remainder is 0.0048.