We look at the division of 62918209 by 321 
The aim is to understand the frequency of 321 in 62918209.

Going ahead to step 1:
When dividing 6 by 321, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 321

Let's proceed to step 2:
If we divide 62 by 321, we get 0 and a remainder of 62.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 62 after subtracting 0 from 62.
Grab the next digit (9) from the dividend, add it to 62, then carry on: 629 / 321

Advancing to step 3:
629 divided by 321 is 1 with a remainder of 308.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 308 after subtracting 321 from 629.
Fetch the next digit (1) from the dividend, attach it to 308 and continue: 3081 / 321

Let's proceed to step 4:
If we divide 3081 by 321, we get 9 and a remainder of 192.
Put 9 as the next digit of the answer. 
Result so far: 19.0
Deduct 2889 from 3081 and we're left with 192.
Bring next digit (8) of the dividend behind the 192 and repeat the process: 1928 / 321

Going ahead to step 5:
321 goes into 1928 6 times with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 196.0
Subtract 1926 from 1928 to get 2.
Append the next digit (2) from the dividend to 2 and continue with: 22 / 321

On to step 6:
The number 321 fits into 22 0 times, leaving a remainder of 22.
Record the quotient 0 as the next digit in the result. 
Result so far: 1960.0
If we subtract 0 from 22, we get 22.
Include the next digit (0) from the dividend after 22, then repeat: 220 / 321

On to step 7:
When dividing 220 by 321, we get 0 with a remainder of 220.
Put 0 as the next digit of the answer. 
Result so far: 19600.0
If we take 0 away from 220, we end up with 220.
Bring next digit (9) of the dividend behind the 220 and repeat the process: 2209 / 321

On to step 8:
If we divide 2209 by 321, we get 6 and a remainder of 283.
Use 6 as the next digit of our solution. 
Result so far: 196006.0
The remainder is 283 after subtracting 1926 from 2209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

Moving on to step 9:
321 goes into 2830 8 times with a remainder of 262.
Use 8 as the next digit of our solution. 
Result so far: 196006.8
Subtract 2568 from 2830 to get 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Advancing to step 10:
2620 divided by 321 is 8 with a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 196006.88
The remainder is 52 after subtracting 2568 from 2620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The quotient of the division is 196006.88, and the remainder is 0.052.