154959 ÷ 39 
The aim is to understand the frequency of 39 in 154959.

Moving on to step 1:
The number 39 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 39

Advancing to step 2:
15 divided by 39 is 0 with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 39

Going ahead to step 3:
39 can be fit into 154 3 times, resulting in a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 117 from 154 leaves us with 37.
Include the next digit (9) from the dividend after 37, then repeat: 379 / 39

Step 4:
39 goes into 379 9 times with a remainder of 28.
The next digit of our result is 9. 
Result so far: 39.0
Subtract 351 from 379 to get 28.
Fetch the next digit (5) from the dividend, attach it to 28 and continue: 285 / 39

On to step 5:
39 can be fit into 285 7 times, resulting in a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 397.0
Subtracting 273 from 285 leaves us with 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 39

Advancing to step 6:
39 can be fit into 129 3 times, resulting in a remainder of 12.
The next digit of our result is 3. 
Result so far: 3973.0
Subtract 117 from 129 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 7:
39 goes into 120 3 times with a remainder of 3.
The next digit of our result is 3. 
Result so far: 3973.3
Deduct 117 from 120 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 8:
39 goes into 30 0 times with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 3973.3
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 9:
The number 39 fits into 300 7 times, leaving a remainder of 27.
Record the quotient 7 as the next digit in the result. 
Result so far: 3973.307
Deduct 273 from 300 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 10:
39 can be fit into 270 6 times, resulting in a remainder of 36.
Write down 6 as next digit of the result. 
Result so far: 3973.3076
If we take 234 away from 270, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 11:
360 divided by 39 is 9 with a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 3973.30769
Subtract 351 from 360 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 12:
90 divided by 39 is 2 with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 3973.307692
If we subtract 78 from 90, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 13:
When dividing 120 by 39, we get 3 with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 3973.3076923
If we subtract 117 from 120, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 14:
When dividing 30 by 39, we get 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 3973.3076923
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 3973.3076923 with a remaining 3e-08.