91196561 ÷ 555 
The aim is to understand the frequency of 555 in 91196561.

Moving on to step 1:
555 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 555

Let's proceed to step 2:
When dividing 91 by 555, we get 0 with a remainder of 91.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 91, we get 91.
Append the next digit (1) from the dividend to 91 and continue with: 911 / 555

Advancing to step 3:
555 goes into 911 1 times with a remainder of 356.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 356 after subtracting 555 from 911.
Append the next digit (9) from the dividend to 356 and continue with: 3569 / 555

Step 4:
If we divide 3569 by 555, we get 6 and a remainder of 239.
Use 6 as the next digit of our solution. 
Result so far: 16.0
Subtracting 3330 from 3569 leaves us with 239.
Fetch the next digit (6) from the dividend, attach it to 239 and continue: 2396 / 555

Advancing to step 5:
The number 555 fits into 2396 4 times, leaving a remainder of 176.
Record the quotient 4 as the next digit in the result. 
Result so far: 164.0
Subtract 2220 from 2396 to get 176.
Include the next digit (5) from the dividend after 176, then repeat: 1765 / 555

Step 6:
1765 divided by 555 is 3 with a remainder of 100.
The number 3 becomes the next digit in our result. 
Result so far: 1643.0
Deduct 1665 from 1765 and we're left with 100.
Fetch the next digit (6) from the dividend, attach it to 100 and continue: 1006 / 555

Step 7:
1006 divided by 555 is 1 with a remainder of 451.
Use 1 as the next digit of our solution. 
Result so far: 16431.0
Deduct 555 from 1006 and we're left with 451.
Fetch the next digit (1) from the dividend, attach it to 451 and continue: 4511 / 555

Moving on to step 8:
555 can be fit into 4511 8 times, resulting in a remainder of 71.
The number 8 becomes the next digit in our result. 
Result so far: 164318.0
Subtract 4440 from 4511 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 9:
710 divided by 555 is 1 with a remainder of 155.
The number 1 becomes the next digit in our result. 
Result so far: 164318.1
Subtract 555 from 710 to get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

On to step 10:
555 goes into 1550 2 times with a remainder of 440.
Put 2 as the next digit of the answer. 
Result so far: 164318.12
If we take 1110 away from 1550, we end up with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

On to step 11:
If we divide 4400 by 555, we get 7 and a remainder of 515.
Put 7 as the next digit of the answer. 
Result so far: 164318.127
If we take 3885 away from 4400, we end up with 515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5150, and continue the process.

Moving on to step 12:
555 goes into 5150 9 times with a remainder of 155.
Write down 9 as next digit of the result. 
Result so far: 164318.1279
Subtracting 4995 from 5150 leaves us with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Going ahead to step 13:
The number 555 fits into 1550 2 times, leaving a remainder of 440.
The number 2 becomes the next digit in our result. 
Result so far: 164318.12792
If we subtract 1110 from 1550, we get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Going ahead to step 14:
The number 555 fits into 4400 7 times, leaving a remainder of 515.
Use 7 as the next digit of our solution. 
Result so far: 164318.127927
If we subtract 3885 from 4400, we get 515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5150, and continue the process.

On to step 15:
If we divide 5150 by 555, we get 9 and a remainder of 155.
The number 9 becomes the next digit in our result. 
Result so far: 164318.1279279
Subtract 4995 from 5150 to get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Let's proceed to step 16:
555 goes into 1550 2 times with a remainder of 440.
Use 2 as the next digit of our solution. 
Result so far: 164318.12792792
If we take 1110 away from 1550, we end up with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

The final result is 164318.12792792 with a remainder of 4.4e-07.