6211351 ÷ 396 
The aim is to understand the frequency of 396 in 6211351.

On to step 1:
396 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 396

Moving on to step 2:
396 goes into 62 0 times with a remainder of 62.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 62, we get 62.
Append the next digit (1) from the dividend to 62 and continue with: 621 / 396

Moving on to step 3:
When dividing 621 by 396, we get 1 with a remainder of 225.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 396 away from 621, we end up with 225.
Take the next digit (1) from the dividend and append it to 225, then repeat: 2251 / 396

Going ahead to step 4:
If we divide 2251 by 396, we get 5 and a remainder of 271.
Put 5 as the next digit of the answer. 
Result so far: 15.0
The remainder is 271 after subtracting 1980 from 2251.
Take the next digit (3) from the dividend and append it to 271, then repeat: 2713 / 396

Step 5:
396 goes into 2713 6 times with a remainder of 337.
Use 6 as the next digit of our solution. 
Result so far: 156.0
Subtracting 2376 from 2713 leaves us with 337.
Include the next digit (5) from the dividend after 337, then repeat: 3375 / 396

Let's proceed to step 6:
The number 396 fits into 3375 8 times, leaving a remainder of 207.
Record the quotient 8 as the next digit in the result. 
Result so far: 1568.0
If we subtract 3168 from 3375, we get 207.
Take the next digit (1) from the dividend and append it to 207, then repeat: 2071 / 396

Moving on to step 7:
2071 divided by 396 is 5 with a remainder of 91.
Write down 5 as next digit of the result. 
Result so far: 15685.0
Subtract 1980 from 2071 to get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Advancing to step 8:
The number 396 fits into 910 2 times, leaving a remainder of 118.
The number 2 becomes the next digit in our result. 
Result so far: 15685.2
Deduct 792 from 910 and we're left with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

On to step 9:
If we divide 1180 by 396, we get 2 and a remainder of 388.
The number 2 becomes the next digit in our result. 
Result so far: 15685.22
Deduct 792 from 1180 and we're left with 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Our division results in 15685.22 with a remaining 0.388.