We're dividing 21219173 by 495 
The aim is to understand the frequency of 495 in 21219173.

Advancing to step 1:
495 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 495

Going ahead to step 2:
If we divide 21 by 495, we get 0 and a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Bring next digit (2) of the dividend behind the 21 and repeat the process: 212 / 495

Going ahead to step 3:
The number 495 fits into 212 0 times, leaving a remainder of 212.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 212, we end up with 212.
Take the next digit (1) from the dividend and append it to 212, then repeat: 2121 / 495

Going ahead to step 4:
495 can be fit into 2121 4 times, resulting in a remainder of 141.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 1980 from 2121 and we're left with 141.
Take the next digit (9) from the dividend and append it to 141, then repeat: 1419 / 495

Moving on to step 5:
When dividing 1419 by 495, we get 2 with a remainder of 429.
Put 2 as the next digit of the answer. 
Result so far: 42.0
Deduct 990 from 1419 and we're left with 429.
Include the next digit (1) from the dividend after 429, then repeat: 4291 / 495

Let's proceed to step 6:
If we divide 4291 by 495, we get 8 and a remainder of 331.
Put 8 as the next digit of the answer. 
Result so far: 428.0
If we subtract 3960 from 4291, we get 331.
Grab the next digit (7) from the dividend, add it to 331, then carry on: 3317 / 495

On to step 7:
3317 divided by 495 is 6 with a remainder of 347.
Record the quotient 6 as the next digit in the result. 
Result so far: 4286.0
The remainder is 347 after subtracting 2970 from 3317.
Bring next digit (3) of the dividend behind the 347 and repeat the process: 3473 / 495

On to step 8:
The number 495 fits into 3473 7 times, leaving a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 42867.0
Subtract 3465 from 3473 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
The number 495 fits into 80 0 times, leaving a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 42867.0
If we subtract 0 from 80, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 10:
495 goes into 800 1 times with a remainder of 305.
Put 1 as the next digit of the answer. 
Result so far: 42867.01
Subtracting 495 from 800 leaves us with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Step 11:
When dividing 3050 by 495, we get 6 with a remainder of 80.
The number 6 becomes the next digit in our result. 
Result so far: 42867.016
Subtracting 2970 from 3050 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 12:
When dividing 800 by 495, we get 1 with a remainder of 305.
Record the quotient 1 as the next digit in the result. 
Result so far: 42867.0161
If we subtract 495 from 800, we get 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Going ahead to step 13:
If we divide 3050 by 495, we get 6 and a remainder of 80.
Record the quotient 6 as the next digit in the result. 
Result so far: 42867.01616
Subtract 2970 from 3050 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 14:
When dividing 800 by 495, we get 1 with a remainder of 305.
Use 1 as the next digit of our solution. 
Result so far: 42867.016161
Deduct 495 from 800 and we're left with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

On to step 15:
3050 divided by 495 is 6 with a remainder of 80.
Write down 6 as next digit of the result. 
Result so far: 42867.0161616
If we subtract 2970 from 3050, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 16:
If we divide 800 by 495, we get 1 and a remainder of 305.
Put 1 as the next digit of the answer. 
Result so far: 42867.01616161
Deduct 495 from 800 and we're left with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

The final outcome is 42867.01616161, with a leftover of 3.05e-07.