We're dividing 18234553 by 121 
The aim is to understand the frequency of 121 in 18234553.

Advancing to step 1:
1 divided by 121 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 121

Advancing to step 2:
18 divided by 121 is 0 with a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 18 and we're left with 18.
Append the next digit (2) from the dividend to 18 and continue with: 182 / 121

Moving on to step 3:
When dividing 182 by 121, we get 1 with a remainder of 61.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 121 away from 182, we end up with 61.
Take the next digit (3) from the dividend and append it to 61, then repeat: 613 / 121

Moving on to step 4:
121 can be fit into 613 5 times, resulting in a remainder of 8.
Write down 5 as next digit of the result. 
Result so far: 15.0
Deduct 605 from 613 and we're left with 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 121

Advancing to step 5:
121 goes into 84 0 times with a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 150.0
Subtract 0 from 84 to get 84.
Include the next digit (5) from the dividend after 84, then repeat: 845 / 121

Going ahead to step 6:
121 goes into 845 6 times with a remainder of 119.
Use 6 as the next digit of our solution. 
Result so far: 1506.0
Subtract 726 from 845 to get 119.
Bring next digit (5) of the dividend behind the 119 and repeat the process: 1195 / 121

Let's proceed to step 7:
1195 divided by 121 is 9 with a remainder of 106.
The next digit of our result is 9. 
Result so far: 15069.0
Deduct 1089 from 1195 and we're left with 106.
Bring next digit (3) of the dividend behind the 106 and repeat the process: 1063 / 121

Going ahead to step 8:
When dividing 1063 by 121, we get 8 with a remainder of 95.
The next digit of our result is 8. 
Result so far: 150698.0
The remainder is 95 after subtracting 968 from 1063.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

On to step 9:
121 can be fit into 950 7 times, resulting in a remainder of 103.
The next digit of our result is 7. 
Result so far: 150698.7
The remainder is 103 after subtracting 847 from 950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

On to step 10:
121 goes into 1030 8 times with a remainder of 62.
Use 8 as the next digit of our solution. 
Result so far: 150698.78
If we take 968 away from 1030, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 11:
620 divided by 121 is 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 150698.785
If we subtract 605 from 620, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 12:
150 divided by 121 is 1 with a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 150698.7851
Subtract 121 from 150 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 13:
290 divided by 121 is 2 with a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 150698.78512
If we take 242 away from 290, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 14:
When dividing 480 by 121, we get 3 with a remainder of 117.
Write down 3 as next digit of the result. 
Result so far: 150698.785123
The remainder is 117 after subtracting 363 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Advancing to step 15:
If we divide 1170 by 121, we get 9 and a remainder of 81.
Write down 9 as next digit of the result. 
Result so far: 150698.7851239
Deduct 1089 from 1170 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 16:
810 divided by 121 is 6 with a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 150698.78512396
Subtract 726 from 810 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Our division results in 150698.78512396 with a remaining 8.4e-08.