We look at the division of 41172436 by 321 
The aim is to understand the frequency of 321 in 41172436.

Advancing to step 1:
The number 321 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 321

On to step 2:
When dividing 41 by 321, we get 0 with a remainder of 41.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 41, we end up with 41.
Append the next digit (1) from the dividend to 41 and continue with: 411 / 321

Step 3:
If we divide 411 by 321, we get 1 and a remainder of 90.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 321 away from 411, we end up with 90.
Grab the next digit (7) from the dividend, add it to 90, then carry on: 907 / 321

Let's proceed to step 4:
321 can be fit into 907 2 times, resulting in a remainder of 265.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we take 642 away from 907, we end up with 265.
Grab the next digit (2) from the dividend, add it to 265, then carry on: 2652 / 321

On to step 5:
The number 321 fits into 2652 8 times, leaving a remainder of 84.
Put 8 as the next digit of the answer. 
Result so far: 128.0
The remainder is 84 after subtracting 2568 from 2652.
Take the next digit (4) from the dividend and append it to 84, then repeat: 844 / 321

On to step 6:
321 can be fit into 844 2 times, resulting in a remainder of 202.
Use 2 as the next digit of our solution. 
Result so far: 1282.0
The remainder is 202 after subtracting 642 from 844.
Grab the next digit (3) from the dividend, add it to 202, then carry on: 2023 / 321

On to step 7:
321 can be fit into 2023 6 times, resulting in a remainder of 97.
Record the quotient 6 as the next digit in the result. 
Result so far: 12826.0
Subtract 1926 from 2023 to get 97.
Bring next digit (6) of the dividend behind the 97 and repeat the process: 976 / 321

Advancing to step 8:
321 goes into 976 3 times with a remainder of 13.
The next digit of our result is 3. 
Result so far: 128263.0
If we subtract 963 from 976, we get 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 9:
If we divide 130 by 321, we get 0 and a remainder of 130.
Record the quotient 0 as the next digit in the result. 
Result so far: 128263.0
Deduct 0 from 130 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 10:
1300 divided by 321 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 128263.04
Subtract 1284 from 1300 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 11:
160 divided by 321 is 0 with a remainder of 160.
Put 0 as the next digit of the answer. 
Result so far: 128263.04
Subtracting 0 from 160 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 12:
If we divide 1600 by 321, we get 4 and a remainder of 316.
The number 4 becomes the next digit in our result. 
Result so far: 128263.0404
Deduct 1284 from 1600 and we're left with 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Moving on to step 13:
If we divide 3160 by 321, we get 9 and a remainder of 271.
Put 9 as the next digit of the answer. 
Result so far: 128263.04049
Subtracting 2889 from 3160 leaves us with 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Advancing to step 14:
321 goes into 2710 8 times with a remainder of 142.
The number 8 becomes the next digit in our result. 
Result so far: 128263.040498
Subtracting 2568 from 2710 leaves us with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Moving on to step 15:
321 can be fit into 1420 4 times, resulting in a remainder of 136.
Put 4 as the next digit of the answer. 
Result so far: 128263.0404984
The remainder is 136 after subtracting 1284 from 1420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Step 16:
If we divide 1360 by 321, we get 4 and a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 128263.04049844
If we subtract 1284 from 1360, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The quotient of the division is 128263.04049844, and the remainder is 7.6e-08.