We look at the division of 49989849 by 221 
The aim is to understand the frequency of 221 in 49989849.

Moving on to step 1:
When dividing 4 by 221, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 221

Let's proceed to step 2:
221 can be fit into 49 0 times, resulting in a remainder of 49.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 49 after subtracting 0 from 49.
Take the next digit (9) from the dividend and append it to 49, then repeat: 499 / 221

Going ahead to step 3:
221 goes into 499 2 times with a remainder of 57.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 442 away from 499, we end up with 57.
Fetch the next digit (8) from the dividend, attach it to 57 and continue: 578 / 221

On to step 4:
221 goes into 578 2 times with a remainder of 136.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
Subtract 442 from 578 to get 136.
Bring next digit (9) of the dividend behind the 136 and repeat the process: 1369 / 221

Moving on to step 5:
1369 divided by 221 is 6 with a remainder of 43.
Use 6 as the next digit of our solution. 
Result so far: 226.0
If we subtract 1326 from 1369, we get 43.
Bring next digit (8) of the dividend behind the 43 and repeat the process: 438 / 221

Step 6:
The number 221 fits into 438 1 times, leaving a remainder of 217.
Use 1 as the next digit of our solution. 
Result so far: 2261.0
Subtracting 221 from 438 leaves us with 217.
Grab the next digit (4) from the dividend, add it to 217, then carry on: 2174 / 221

Moving on to step 7:
221 can be fit into 2174 9 times, resulting in a remainder of 185.
The next digit of our result is 9. 
Result so far: 22619.0
Subtracting 1989 from 2174 leaves us with 185.
Append the next digit (9) from the dividend to 185 and continue with: 1859 / 221

On to step 8:
If we divide 1859 by 221, we get 8 and a remainder of 91.
The number 8 becomes the next digit in our result. 
Result so far: 226198.0
Subtract 1768 from 1859 to get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Advancing to step 9:
When dividing 910 by 221, we get 4 with a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 226198.4
Deduct 884 from 910 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 10:
221 can be fit into 260 1 times, resulting in a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 226198.41
If we subtract 221 from 260, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 11:
221 can be fit into 390 1 times, resulting in a remainder of 169.
The next digit of our result is 1. 
Result so far: 226198.411
Subtract 221 from 390 to get 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

After the division, we end up with 226198.411 and a remainder of 0.0169.