372354 ÷ 39 
The aim is to understand the frequency of 39 in 372354.

Let's proceed to step 1:
If we divide 3 by 39, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Append the next digit (7) from the dividend to 3 and continue with: 37 / 39

Step 2:
If we divide 37 by 39, we get 0 and a remainder of 37.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 37 to get 37.
Take the next digit (2) from the dividend and append it to 37, then repeat: 372 / 39

Going ahead to step 3:
The number 39 fits into 372 9 times, leaving a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 351 from 372 and we're left with 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 39

On to step 4:
39 can be fit into 213 5 times, resulting in a remainder of 18.
Put 5 as the next digit of the answer. 
Result so far: 95.0
If we take 195 away from 213, we end up with 18.
Grab the next digit (5) from the dividend, add it to 18, then carry on: 185 / 39

Advancing to step 5:
If we divide 185 by 39, we get 4 and a remainder of 29.
Use 4 as the next digit of our solution. 
Result so far: 954.0
Subtract 156 from 185 to get 29.
Fetch the next digit (4) from the dividend, attach it to 29 and continue: 294 / 39

Going ahead to step 6:
39 goes into 294 7 times with a remainder of 21.
The next digit of our result is 7. 
Result so far: 9547.0
Subtract 273 from 294 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 7:
When dividing 210 by 39, we get 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 9547.5
Deduct 195 from 210 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 8:
If we divide 150 by 39, we get 3 and a remainder of 33.
Put 3 as the next digit of the answer. 
Result so far: 9547.53
Subtracting 117 from 150 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 9:
330 divided by 39 is 8 with a remainder of 18.
Write down 8 as next digit of the result. 
Result so far: 9547.538
Subtract 312 from 330 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 10:
When dividing 180 by 39, we get 4 with a remainder of 24.
Use 4 as the next digit of our solution. 
Result so far: 9547.5384
The remainder is 24 after subtracting 156 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 11:
39 can be fit into 240 6 times, resulting in a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 9547.53846
Deduct 234 from 240 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 12:
39 goes into 60 1 times with a remainder of 21.
Put 1 as the next digit of the answer. 
Result so far: 9547.538461
Deduct 39 from 60 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 13:
The number 39 fits into 210 5 times, leaving a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 9547.5384615
Subtract 195 from 210 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 14:
If we divide 150 by 39, we get 3 and a remainder of 33.
The next digit of our result is 3. 
Result so far: 9547.53846153
The remainder is 33 after subtracting 117 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

After the division, we end up with 9547.53846153 and a remainder of 3.3e-08.