21602420 divided by 631 
The aim is to understand the frequency of 631 in 21602420.

Advancing to step 1:
When dividing 2 by 631, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 631

Moving on to step 2:
When dividing 21 by 631, we get 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Bring next digit (6) of the dividend behind the 21 and repeat the process: 216 / 631

Moving on to step 3:
When dividing 216 by 631, we get 0 with a remainder of 216.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 216 leaves us with 216.
Bring next digit (0) of the dividend behind the 216 and repeat the process: 2160 / 631

On to step 4:
2160 divided by 631 is 3 with a remainder of 267.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 1893 from 2160 and we're left with 267.
Fetch the next digit (2) from the dividend, attach it to 267 and continue: 2672 / 631

Step 5:
2672 divided by 631 is 4 with a remainder of 148.
Use 4 as the next digit of our solution. 
Result so far: 34.0
Deduct 2524 from 2672 and we're left with 148.
Fetch the next digit (4) from the dividend, attach it to 148 and continue: 1484 / 631

Step 6:
631 can be fit into 1484 2 times, resulting in a remainder of 222.
Write down 2 as next digit of the result. 
Result so far: 342.0
If we subtract 1262 from 1484, we get 222.
Grab the next digit (2) from the dividend, add it to 222, then carry on: 2222 / 631

On to step 7:
The number 631 fits into 2222 3 times, leaving a remainder of 329.
The next digit of our result is 3. 
Result so far: 3423.0
Subtract 1893 from 2222 to get 329.
Grab the next digit (0) from the dividend, add it to 329, then carry on: 3290 / 631

Advancing to step 8:
631 can be fit into 3290 5 times, resulting in a remainder of 135.
The next digit of our result is 5. 
Result so far: 34235.0
Subtract 3155 from 3290 to get 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Going ahead to step 9:
1350 divided by 631 is 2 with a remainder of 88.
The next digit of our result is 2. 
Result so far: 34235.2
If we subtract 1262 from 1350, we get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Step 10:
The number 631 fits into 880 1 times, leaving a remainder of 249.
Record the quotient 1 as the next digit in the result. 
Result so far: 34235.21
Subtracting 631 from 880 leaves us with 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

Moving on to step 11:
When dividing 2490 by 631, we get 3 with a remainder of 597.
Put 3 as the next digit of the answer. 
Result so far: 34235.213
The remainder is 597 after subtracting 1893 from 2490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5970, and continue the process.

Step 12:
631 goes into 5970 9 times with a remainder of 291.
Put 9 as the next digit of the answer. 
Result so far: 34235.2139
The remainder is 291 after subtracting 5679 from 5970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

Advancing to step 13:
2910 divided by 631 is 4 with a remainder of 386.
Put 4 as the next digit of the answer. 
Result so far: 34235.21394
Subtract 2524 from 2910 to get 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Moving on to step 14:
631 goes into 3860 6 times with a remainder of 74.
Record the quotient 6 as the next digit in the result. 
Result so far: 34235.213946
Subtracting 3786 from 3860 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 15:
The number 631 fits into 740 1 times, leaving a remainder of 109.
Write down 1 as next digit of the result. 
Result so far: 34235.2139461
Subtracting 631 from 740 leaves us with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Step 16:
If we divide 1090 by 631, we get 1 and a remainder of 459.
The number 1 becomes the next digit in our result. 
Result so far: 34235.21394611
If we subtract 631 from 1090, we get 459.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4590, and continue the process.

In conclusion, the division gives 34235.21394611 with a balance of 4.59e-07.