We're dividing 55112089 by 121 
The aim is to understand the frequency of 121 in 55112089.

Going ahead to step 1:
When dividing 5 by 121, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 121

On to step 2:
The number 121 fits into 55 0 times, leaving a remainder of 55.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 55, we get 55.
Append the next digit (1) from the dividend to 55 and continue with: 551 / 121

Going ahead to step 3:
121 can be fit into 551 4 times, resulting in a remainder of 67.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 484 from 551 and we're left with 67.
Take the next digit (1) from the dividend and append it to 67, then repeat: 671 / 121

Going ahead to step 4:
121 can be fit into 671 5 times, resulting in a remainder of 66.
Use 5 as the next digit of our solution. 
Result so far: 45.0
Subtracting 605 from 671 leaves us with 66.
Include the next digit (2) from the dividend after 66, then repeat: 662 / 121

Advancing to step 5:
662 divided by 121 is 5 with a remainder of 57.
Put 5 as the next digit of the answer. 
Result so far: 455.0
Subtract 605 from 662 to get 57.
Fetch the next digit (0) from the dividend, attach it to 57 and continue: 570 / 121

On to step 6:
If we divide 570 by 121, we get 4 and a remainder of 86.
The next digit of our result is 4. 
Result so far: 4554.0
If we take 484 away from 570, we end up with 86.
Grab the next digit (8) from the dividend, add it to 86, then carry on: 868 / 121

Moving on to step 7:
The number 121 fits into 868 7 times, leaving a remainder of 21.
Put 7 as the next digit of the answer. 
Result so far: 45547.0
Deduct 847 from 868 and we're left with 21.
Fetch the next digit (9) from the dividend, attach it to 21 and continue: 219 / 121

Going ahead to step 8:
219 divided by 121 is 1 with a remainder of 98.
The next digit of our result is 1. 
Result so far: 455471.0
Subtracting 121 from 219 leaves us with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Advancing to step 9:
980 divided by 121 is 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 455471.8
Subtract 968 from 980 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 10:
The number 121 fits into 120 0 times, leaving a remainder of 120.
The next digit of our result is 0. 
Result so far: 455471.8
Deduct 0 from 120 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 11:
When dividing 1200 by 121, we get 9 with a remainder of 111.
Record the quotient 9 as the next digit in the result. 
Result so far: 455471.809
If we take 1089 away from 1200, we end up with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

On to step 12:
121 goes into 1110 9 times with a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 455471.8099
Deduct 1089 from 1110 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

The final result is 455471.8099 with a remainder of 0.00021.