638837 ÷ 12 
The aim is to understand the frequency of 12 in 638837.

On to step 1:
12 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 12

Step 2:
When dividing 63 by 12, we get 5 with a remainder of 3.
The next digit of our result is 5. 
Result so far: 5.0
If we take 60 away from 63, we end up with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 12

Let's proceed to step 3:
38 divided by 12 is 3 with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 53.0
Deduct 36 from 38 and we're left with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 12

Step 4:
12 can be fit into 28 2 times, resulting in a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 532.0
If we take 24 away from 28, we end up with 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 12

Moving on to step 5:
The number 12 fits into 43 3 times, leaving a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 5323.0
If we take 36 away from 43, we end up with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 12

Let's proceed to step 6:
77 divided by 12 is 6 with a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 53236.0
Subtract 72 from 77 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 7:
When dividing 50 by 12, we get 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 53236.4
Subtracting 48 from 50 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
When dividing 20 by 12, we get 1 with a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 53236.41
If we subtract 12 from 20, we 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.

On to step 9:
12 goes into 80 6 times with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 53236.416
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 10:
12 can be fit into 80 6 times, resulting in a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 53236.4166
Subtract 72 from 80 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.

The final result is 53236.4166 with a remainder of 8e-05.