Let's divide 641628 by 39
The aim is to understand the frequency of 39 in 641628.

Step 1:
When dividing 6 by 39, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 39

Let's proceed to step 2:
64 divided by 39 is 1 with a remainder of 25.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 25 after subtracting 39 from 64.
Fetch the next digit (1) from the dividend, attach it to 25 and continue: 251 / 39

Let's proceed to step 3:
251 divided by 39 is 6 with a remainder of 17.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Deduct 234 from 251 and we're left with 17.
Take the next digit (6) from the dividend and append it to 17, then repeat: 176 / 39

Going ahead to step 4:
The number 39 fits into 176 4 times, leaving a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 164.0
If we subtract 156 from 176, we get 20.
Include the next digit (2) from the dividend after 20, then repeat: 202 / 39

Moving on to step 5:
39 can be fit into 202 5 times, resulting in a remainder of 7.
Put 5 as the next digit of the answer. 
Result so far: 1645.0
If we subtract 195 from 202, we get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 39

Going ahead to step 6:
If we divide 78 by 39, we get 2 and a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 16452.0
If we take 78 away from 78, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
When dividing 0 by 39, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 16452.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
39 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 16452.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 16452.0, with a leftover of 0.0.