We're dividing 161629 by 39 
The aim is to understand the frequency of 39 in 161629.

On to step 1:
39 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 39

Let's proceed to step 2:
If we divide 16 by 39, we get 0 and a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 39

Step 3:
The number 39 fits into 161 4 times, leaving a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 5 after subtracting 156 from 161.
Grab the next digit (6) from the dividend, add it to 5, then carry on: 56 / 39

Advancing to step 4:
The number 39 fits into 56 1 times, leaving a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 41.0
Subtracting 39 from 56 leaves us with 17.
Append the next digit (2) from the dividend to 17 and continue with: 172 / 39

Moving on to step 5:
The number 39 fits into 172 4 times, leaving a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 414.0
The remainder is 16 after subtracting 156 from 172.
Fetch the next digit (9) from the dividend, attach it to 16 and continue: 169 / 39

On to step 6:
When dividing 169 by 39, we get 4 with a remainder of 13.
Put 4 as the next digit of the answer. 
Result so far: 4144.0
Subtracting 156 from 169 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 7:
130 divided by 39 is 3 with a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 4144.3
The remainder is 13 after subtracting 117 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 8:
130 divided by 39 is 3 with a remainder of 13.
The number 3 becomes the next digit in our result. 
Result so far: 4144.33
If we subtract 117 from 130, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The quotient of the division is 4144.33, and the remainder is 0.013.