21431880 divided by 122 
The aim is to understand the frequency of 122 in 21431880.

Advancing to step 1:
When dividing 2 by 122, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 122

On to step 2:
122 can be fit into 21 0 times, resulting in a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Grab the next digit (4) from the dividend, add it to 21, then carry on: 214 / 122

Let's proceed to step 3:
122 can be fit into 214 1 times, resulting in a remainder of 92.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 122 from 214 leaves us with 92.
Grab the next digit (3) from the dividend, add it to 92, then carry on: 923 / 122

Let's proceed to step 4:
The number 122 fits into 923 7 times, leaving a remainder of 69.
The next digit of our result is 7. 
Result so far: 17.0
Subtracting 854 from 923 leaves us with 69.
Grab the next digit (1) from the dividend, add it to 69, then carry on: 691 / 122

Going ahead to step 5:
691 divided by 122 is 5 with a remainder of 81.
Put 5 as the next digit of the answer. 
Result so far: 175.0
The remainder is 81 after subtracting 610 from 691.
Grab the next digit (8) from the dividend, add it to 81, then carry on: 818 / 122

Step 6:
When dividing 818 by 122, we get 6 with a remainder of 86.
The next digit of our result is 6. 
Result so far: 1756.0
If we take 732 away from 818, we end up with 86.
Append the next digit (8) from the dividend to 86 and continue with: 868 / 122

Step 7:
When dividing 868 by 122, we get 7 with a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 17567.0
Subtract 854 from 868 to get 14.
Fetch the next digit (0) from the dividend, attach it to 14 and continue: 140 / 122

Advancing to step 8:
If we divide 140 by 122, we get 1 and a remainder of 18.
The next digit of our result is 1. 
Result so far: 175671.0
If we subtract 122 from 140, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 9:
122 goes into 180 1 times with a remainder of 58.
The number 1 becomes the next digit in our result. 
Result so far: 175671.1
The remainder is 58 after subtracting 122 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 10:
122 can be fit into 580 4 times, resulting in a remainder of 92.
Record the quotient 4 as the next digit in the result. 
Result so far: 175671.14
The remainder is 92 after subtracting 488 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Advancing to step 11:
If we divide 920 by 122, we get 7 and a remainder of 66.
Use 7 as the next digit of our solution. 
Result so far: 175671.147
If we subtract 854 from 920, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 12:
If we divide 660 by 122, we get 5 and a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 175671.1475
The remainder is 50 after subtracting 610 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 13:
500 divided by 122 is 4 with a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 175671.14754
Subtracting 488 from 500 leaves us with 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 14:
When dividing 120 by 122, we get 0 with a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 175671.14754
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 15:
If we divide 1200 by 122, we get 9 and a remainder of 102.
Use 9 as the next digit of our solution. 
Result so far: 175671.1475409
Deduct 1098 from 1200 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.

Step 16:
When dividing 1020 by 122, we get 8 with a remainder of 44.
Write down 8 as next digit of the result. 
Result so far: 175671.14754098
Subtracting 976 from 1020 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final result is 175671.14754098 with a remainder of 4.4e-08.