42150226 ÷ 39 
The aim is to understand the frequency of 39 in 42150226.

Step 1:
39 goes into 4 0 times with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 39

On to step 2:
39 can be fit into 42 1 times, resulting in a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 39 away from 42, we end up with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 39

Let's proceed to step 3:
31 divided by 39 is 0 with a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Deduct 0 from 31 and we're left with 31.
Include the next digit (5) from the dividend after 31, then repeat: 315 / 39

On to step 4:
When dividing 315 by 39, we get 8 with a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 108.0
Deduct 312 from 315 and we're left with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 39

On to step 5:
If we divide 30 by 39, we get 0 and a remainder of 30.
The next digit of our result is 0. 
Result so far: 1080.0
Deduct 0 from 30 and we're left with 30.
Append the next digit (2) from the dividend to 30 and continue with: 302 / 39

Moving on to step 6:
If we divide 302 by 39, we get 7 and a remainder of 29.
Put 7 as the next digit of the answer. 
Result so far: 10807.0
Subtract 273 from 302 to get 29.
Take the next digit (2) from the dividend and append it to 29, then repeat: 292 / 39

Let's proceed to step 7:
39 can be fit into 292 7 times, resulting in a remainder of 19.
The next digit of our result is 7. 
Result so far: 108077.0
Subtract 273 from 292 to get 19.
Fetch the next digit (6) from the dividend, attach it to 19 and continue: 196 / 39

Going ahead to step 8:
39 goes into 196 5 times with a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 1080775.0
If we subtract 195 from 196, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 9:
10 divided by 39 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 1080775.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 10:
The number 39 fits into 100 2 times, leaving a remainder of 22.
The next digit of our result is 2. 
Result so far: 1080775.02
Deduct 78 from 100 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 11:
39 can be fit into 220 5 times, resulting in a remainder of 25.
The next digit of our result is 5. 
Result so far: 1080775.025
If we subtract 195 from 220, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 12:
39 can be fit into 250 6 times, resulting in a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 1080775.0256
If we subtract 234 from 250, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
39 goes into 160 4 times with a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 1080775.02564
The remainder is 4 after subtracting 156 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 14:
39 can be fit into 40 1 times, resulting in a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 1080775.025641
The remainder is 1 after subtracting 39 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 15:
39 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 1080775.025641
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 16:
When dividing 100 by 39, we get 2 with a remainder of 22.
Record the quotient 2 as the next digit in the result. 
Result so far: 1080775.02564102
Subtract 78 from 100 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

After the division, we end up with 1080775.02564102 and a remainder of 2.2e-08.