3582750 divided by 209 
The aim is to understand the frequency of 209 in 3582750.

Step 1:
The number 209 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 209

Moving on to step 2:
The number 209 fits into 35 0 times, leaving a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 35 after subtracting 0 from 35.
Fetch the next digit (8) from the dividend, attach it to 35 and continue: 358 / 209

Going ahead to step 3:
358 divided by 209 is 1 with a remainder of 149.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 149 after subtracting 209 from 358.
Take the next digit (2) from the dividend and append it to 149, then repeat: 1492 / 209

Advancing to step 4:
209 can be fit into 1492 7 times, resulting in a remainder of 29.
Use 7 as the next digit of our solution. 
Result so far: 17.0
If we subtract 1463 from 1492, we get 29.
Fetch the next digit (7) from the dividend, attach it to 29 and continue: 297 / 209

Going ahead to step 5:
When dividing 297 by 209, we get 1 with a remainder of 88.
Use 1 as the next digit of our solution. 
Result so far: 171.0
Subtracting 209 from 297 leaves us with 88.
Fetch the next digit (5) from the dividend, attach it to 88 and continue: 885 / 209

Moving on to step 6:
If we divide 885 by 209, we get 4 and a remainder of 49.
Write down 4 as next digit of the result. 
Result so far: 1714.0
Subtracting 836 from 885 leaves us with 49.
Append the next digit (0) from the dividend to 49 and continue with: 490 / 209

Moving on to step 7:
When dividing 490 by 209, we get 2 with a remainder of 72.
Use 2 as the next digit of our solution. 
Result so far: 17142.0
Subtract 418 from 490 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 8:
The number 209 fits into 720 3 times, leaving a remainder of 93.
Write down 3 as next digit of the result. 
Result so far: 17142.3
Deduct 627 from 720 and we're left with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

On to step 9:
The number 209 fits into 930 4 times, leaving a remainder of 94.
Put 4 as the next digit of the answer. 
Result so far: 17142.34
The remainder is 94 after subtracting 836 from 930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Moving on to step 10:
940 divided by 209 is 4 with a remainder of 104.
Record the quotient 4 as the next digit in the result. 
Result so far: 17142.344
Subtract 836 from 940 to get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

The final outcome is 17142.344, with a leftover of 0.0104.