7721050 ÷ 321 
The aim is to understand the frequency of 321 in 7721050.

Going ahead to step 1:
7 divided by 321 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 321

Step 2:
If we divide 77 by 321, we get 0 and a remainder of 77.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Take the next digit (2) from the dividend and append it to 77, then repeat: 772 / 321

Going ahead to step 3:
772 divided by 321 is 2 with a remainder of 130.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 642 from 772, we get 130.
Append the next digit (1) from the dividend to 130 and continue with: 1301 / 321

Moving on to step 4:
1301 divided by 321 is 4 with a remainder of 17.
Write down 4 as next digit of the result. 
Result so far: 24.0
If we subtract 1284 from 1301, we get 17.
Grab the next digit (0) from the dividend, add it to 17, then carry on: 170 / 321

Advancing to step 5:
170 divided by 321 is 0 with a remainder of 170.
Put 0 as the next digit of the answer. 
Result so far: 240.0
Subtracting 0 from 170 leaves us with 170.
Include the next digit (5) from the dividend after 170, then repeat: 1705 / 321

Let's proceed to step 6:
1705 divided by 321 is 5 with a remainder of 100.
Record the quotient 5 as the next digit in the result. 
Result so far: 2405.0
If we subtract 1605 from 1705, we get 100.
Bring next digit (0) of the dividend behind the 100 and repeat the process: 1000 / 321

Let's proceed to step 7:
When dividing 1000 by 321, we get 3 with a remainder of 37.
The number 3 becomes the next digit in our result. 
Result so far: 24053.0
Subtract 963 from 1000 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 8:
321 goes into 370 1 times with a remainder of 49.
Record the quotient 1 as the next digit in the result. 
Result so far: 24053.1
Deduct 321 from 370 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 9:
490 divided by 321 is 1 with a remainder of 169.
The next digit of our result is 1. 
Result so far: 24053.11
Subtracting 321 from 490 leaves us with 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

In conclusion, the division gives 24053.11 with a balance of 0.169.