We look at the division of 19530761 by 121 
The aim is to understand the frequency of 121 in 19530761.

On to step 1:
1 divided by 121 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 121

Step 2:
If we divide 19 by 121, we get 0 and a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 19 after subtracting 0 from 19.
Append the next digit (5) from the dividend to 19 and continue with: 195 / 121

Step 3:
The number 121 fits into 195 1 times, leaving a remainder of 74.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 121 from 195, we get 74.
Take the next digit (3) from the dividend and append it to 74, then repeat: 743 / 121

Let's proceed to step 4:
If we divide 743 by 121, we get 6 and a remainder of 17.
The next digit of our result is 6. 
Result so far: 16.0
If we take 726 away from 743, we end up with 17.
Include the next digit (0) from the dividend after 17, then repeat: 170 / 121

Going ahead to step 5:
170 divided by 121 is 1 with a remainder of 49.
The number 1 becomes the next digit in our result. 
Result so far: 161.0
If we take 121 away from 170, we end up with 49.
Append the next digit (7) from the dividend to 49 and continue with: 497 / 121

Going ahead to step 6:
497 divided by 121 is 4 with a remainder of 13.
The next digit of our result is 4. 
Result so far: 1614.0
If we take 484 away from 497, we end up with 13.
Grab the next digit (6) from the dividend, add it to 13, then carry on: 136 / 121

Moving on to step 7:
121 goes into 136 1 times with a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 16141.0
The remainder is 15 after subtracting 121 from 136.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 121

Step 8:
When dividing 151 by 121, we get 1 with a remainder of 30.
Write down 1 as next digit of the result. 
Result so far: 161411.0
If we subtract 121 from 151, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 9:
300 divided by 121 is 2 with a remainder of 58.
Write down 2 as next digit of the result. 
Result so far: 161411.2
Subtract 242 from 300 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 10:
The number 121 fits into 580 4 times, leaving a remainder of 96.
The next digit of our result is 4. 
Result so far: 161411.24
Subtracting 484 from 580 leaves us with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Moving on to step 11:
When dividing 960 by 121, we get 7 with a remainder of 113.
Write down 7 as next digit of the result. 
Result so far: 161411.247
Deduct 847 from 960 and we're left with 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

Advancing to step 12:
If we divide 1130 by 121, we get 9 and a remainder of 41.
Put 9 as the next digit of the answer. 
Result so far: 161411.2479
Deduct 1089 from 1130 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 13:
410 divided by 121 is 3 with a remainder of 47.
Use 3 as the next digit of our solution. 
Result so far: 161411.24793
If we take 363 away from 410, we end up with 47.
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 14:
The number 121 fits into 470 3 times, leaving a remainder of 107.
Put 3 as the next digit of the answer. 
Result so far: 161411.247933
Subtract 363 from 470 to get 107.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1070, and continue the process.

Our division results in 161411.247933 with a remaining 1.07e-05.