672890 ÷ 39 
The aim is to understand the frequency of 39 in 672890.

Step 1:
6 divided by 39 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (7) of the dividend behind the 6 and repeat the process: 67 / 39

Advancing to step 2:
39 can be fit into 67 1 times, resulting in a remainder of 28.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 39 from 67, we get 28.
Bring next digit (2) of the dividend behind the 28 and repeat the process: 282 / 39

Step 3:
282 divided by 39 is 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we subtract 273 from 282, we get 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 39

On to step 4:
98 divided by 39 is 2 with a remainder of 20.
The next digit of our result is 2. 
Result so far: 172.0
Deduct 78 from 98 and we're left with 20.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 39

Step 5:
39 goes into 209 5 times with a remainder of 14.
Write down 5 as next digit of the result. 
Result so far: 1725.0
If we subtract 195 from 209, we get 14.
Bring next digit (0) of the dividend behind the 14 and repeat the process: 140 / 39

Advancing to step 6:
When dividing 140 by 39, we get 3 with a remainder of 23.
Record the quotient 3 as the next digit in the result. 
Result so far: 17253.0
If we take 117 away from 140, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 7:
When dividing 230 by 39, we get 5 with a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 17253.5
If we take 195 away from 230, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 8:
39 can be fit into 350 8 times, resulting in a remainder of 38.
Record the quotient 8 as the next digit in the result. 
Result so far: 17253.58
If we take 312 away from 350, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 9:
39 can be fit into 380 9 times, resulting in a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 17253.589
Deduct 351 from 380 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 10:
The number 39 fits into 290 7 times, leaving a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 17253.5897
Subtracting 273 from 290 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 11:
When dividing 170 by 39, we get 4 with a remainder of 14.
The next digit of our result is 4. 
Result so far: 17253.58974
The remainder is 14 after subtracting 156 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 12:
If we divide 140 by 39, we get 3 and a remainder of 23.
The number 3 becomes the next digit in our result. 
Result so far: 17253.589743
The remainder is 23 after subtracting 117 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 13:
The number 39 fits into 230 5 times, leaving a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 17253.5897435
Subtracting 195 from 230 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 14:
If we divide 350 by 39, we get 8 and a remainder of 38.
Put 8 as the next digit of the answer. 
Result so far: 17253.58974358
Deduct 312 from 350 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Our division results in 17253.58974358 with a remaining 3.8e-08.