We look at the division of 91123819 by 366 
The aim is to understand the frequency of 366 in 91123819.

Advancing to step 1:
9 divided by 366 is 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 366

Moving on to step 2:
366 goes into 91 0 times with a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Grab the next digit (1) from the dividend, add it to 91, then carry on: 911 / 366

Going ahead to step 3:
When dividing 911 by 366, we get 2 with a remainder of 179.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 732 away from 911, we end up with 179.
Bring next digit (2) of the dividend behind the 179 and repeat the process: 1792 / 366

Advancing to step 4:
When dividing 1792 by 366, we get 4 with a remainder of 328.
Write down 4 as next digit of the result. 
Result so far: 24.0
If we subtract 1464 from 1792, we get 328.
Take the next digit (3) from the dividend and append it to 328, then repeat: 3283 / 366

Step 5:
3283 divided by 366 is 8 with a remainder of 355.
Use 8 as the next digit of our solution. 
Result so far: 248.0
Subtracting 2928 from 3283 leaves us with 355.
Bring next digit (8) of the dividend behind the 355 and repeat the process: 3558 / 366

On to step 6:
If we divide 3558 by 366, we get 9 and a remainder of 264.
Record the quotient 9 as the next digit in the result. 
Result so far: 2489.0
Deduct 3294 from 3558 and we're left with 264.
Bring next digit (1) of the dividend behind the 264 and repeat the process: 2641 / 366

Let's proceed to step 7:
366 can be fit into 2641 7 times, resulting in a remainder of 79.
Use 7 as the next digit of our solution. 
Result so far: 24897.0
The remainder is 79 after subtracting 2562 from 2641.
Take the next digit (9) from the dividend and append it to 79, then repeat: 799 / 366

Moving on to step 8:
The number 366 fits into 799 2 times, leaving a remainder of 67.
Use 2 as the next digit of our solution. 
Result so far: 248972.0
If we subtract 732 from 799, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

On to step 9:
If we divide 670 by 366, we get 1 and a remainder of 304.
Record the quotient 1 as the next digit in the result. 
Result so far: 248972.1
If we subtract 366 from 670, we get 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Going ahead to step 10:
The number 366 fits into 3040 8 times, leaving a remainder of 112.
The number 8 becomes the next digit in our result. 
Result so far: 248972.18
If we take 2928 away from 3040, we end up with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Moving on to step 11:
1120 divided by 366 is 3 with a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 248972.183
The remainder is 22 after subtracting 1098 from 1120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 12:
When dividing 220 by 366, we get 0 with a remainder of 220.
The number 0 becomes the next digit in our result. 
Result so far: 248972.183
Deduct 0 from 220 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Going ahead to step 13:
366 goes into 2200 6 times with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 248972.18306
Subtract 2196 from 2200 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 14:
When dividing 40 by 366, we get 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 248972.18306
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 15:
366 goes into 400 1 times with a remainder of 34.
The next digit of our result is 1. 
Result so far: 248972.1830601
Subtracting 366 from 400 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 16:
When dividing 340 by 366, we get 0 with a remainder of 340.
Write down 0 as next digit of the result. 
Result so far: 248972.1830601
If we subtract 0 from 340, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

In conclusion, the division gives 248972.1830601 with a balance of 3.4e-07.