23878869 divided by 209 
The aim is to understand the frequency of 209 in 23878869.

Let's proceed to step 1:
The number 209 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 209

Advancing to step 2:
When dividing 23 by 209, we get 0 with a remainder of 23.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 23 and we're left with 23.
Grab the next digit (8) from the dividend, add it to 23, then carry on: 238 / 209

Moving on to step 3:
238 divided by 209 is 1 with a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 209 away from 238, we end up with 29.
Append the next digit (7) from the dividend to 29 and continue with: 297 / 209

On to step 4:
209 can be fit into 297 1 times, resulting in a remainder of 88.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtracting 209 from 297 leaves us with 88.
Take the next digit (8) from the dividend and append it to 88, then repeat: 888 / 209

Step 5:
If we divide 888 by 209, we get 4 and a remainder of 52.
Record the quotient 4 as the next digit in the result. 
Result so far: 114.0
Deduct 836 from 888 and we're left with 52.
Append the next digit (8) from the dividend to 52 and continue with: 528 / 209

Moving on to step 6:
When dividing 528 by 209, we get 2 with a remainder of 110.
The number 2 becomes the next digit in our result. 
Result so far: 1142.0
If we subtract 418 from 528, we get 110.
Include the next digit (6) from the dividend after 110, then repeat: 1106 / 209

Advancing to step 7:
If we divide 1106 by 209, we get 5 and a remainder of 61.
The next digit of our result is 5. 
Result so far: 11425.0
If we subtract 1045 from 1106, we get 61.
Fetch the next digit (9) from the dividend, attach it to 61 and continue: 619 / 209

On to step 8:
If we divide 619 by 209, we get 2 and a remainder of 201.
The next digit of our result is 2. 
Result so far: 114252.0
Subtract 418 from 619 to get 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Let's proceed to step 9:
2010 divided by 209 is 9 with a remainder of 129.
Use 9 as the next digit of our solution. 
Result so far: 114252.9
If we take 1881 away from 2010, we end up with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Going ahead to step 10:
If we divide 1290 by 209, we get 6 and a remainder of 36.
The number 6 becomes the next digit in our result. 
Result so far: 114252.96
The remainder is 36 after subtracting 1254 from 1290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
If we divide 360 by 209, we get 1 and a remainder of 151.
Use 1 as the next digit of our solution. 
Result so far: 114252.961
Deduct 209 from 360 and we're left with 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Moving on to step 12:
209 can be fit into 1510 7 times, resulting in a remainder of 47.
Record the quotient 7 as the next digit in the result. 
Result so far: 114252.9617
The remainder is 47 after subtracting 1463 from 1510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 13:
209 can be fit into 470 2 times, resulting in a remainder of 52.
The number 2 becomes the next digit in our result. 
Result so far: 114252.96172
Subtract 418 from 470 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 14:
If we divide 520 by 209, we get 2 and a remainder of 102.
Write down 2 as next digit of the result. 
Result so far: 114252.961722
Deduct 418 from 520 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

After the division, we end up with 114252.961722 and a remainder of 1.02e-05.