666649 ÷ 38 
The aim is to understand the frequency of 38 in 666649.

Moving on to step 1:
The number 38 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 38

Step 2:
When dividing 66 by 38, we get 1 with a remainder of 28.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 38 from 66 to get 28.
Grab the next digit (6) from the dividend, add it to 28, then carry on: 286 / 38

On to step 3:
The number 38 fits into 286 7 times, leaving a remainder of 20.
The next digit of our result is 7. 
Result so far: 17.0
If we subtract 266 from 286, we get 20.
Append the next digit (6) from the dividend to 20 and continue with: 206 / 38

Advancing to step 4:
When dividing 206 by 38, we get 5 with a remainder of 16.
Use 5 as the next digit of our solution. 
Result so far: 175.0
Subtracting 190 from 206 leaves us with 16.
Grab the next digit (4) from the dividend, add it to 16, then carry on: 164 / 38

Step 5:
If we divide 164 by 38, we get 4 and a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 1754.0
If we take 152 away from 164, we end up with 12.
Take the next digit (9) from the dividend and append it to 12, then repeat: 129 / 38

Let's proceed to step 6:
If we divide 129 by 38, we get 3 and a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 17543.0
Subtracting 114 from 129 leaves us 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.

Going ahead to step 7:
38 can be fit into 150 3 times, resulting in a remainder of 36.
Write down 3 as next digit of the result. 
Result so far: 17543.3
Subtracting 114 from 150 leaves us 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.

Going ahead to step 8:
If we divide 360 by 38, we get 9 and a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 17543.39
Subtract 342 from 360 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 9:
38 goes into 180 4 times with a remainder of 28.
Write down 4 as next digit of the result. 
Result so far: 17543.394
The remainder is 28 after subtracting 152 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 10:
38 can be fit into 280 7 times, resulting in a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 17543.3947
Subtracting 266 from 280 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 11:
38 goes into 140 3 times with a remainder of 26.
The number 3 becomes the next digit in our result. 
Result so far: 17543.39473
If we subtract 114 from 140, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 12:
38 goes into 260 6 times with a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 17543.394736
If we subtract 228 from 260, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 13:
The number 38 fits into 320 8 times, leaving a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 17543.3947368
Subtracting 304 from 320 leaves us with 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 14:
If we divide 160 by 38, we get 4 and a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 17543.39473684
If we subtract 152 from 160, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 17543.39473684, with a leftover of 8e-09.