Let's divide 21028893 by 631
The aim is to understand the frequency of 631 in 21028893.

On to step 1:
If we divide 2 by 631, we get 0 and 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.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 631

Let's proceed to step 2:
If we divide 21 by 631, we get 0 and a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 631

Let's proceed to step 3:
The number 631 fits into 210 0 times, leaving a remainder of 210.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 210 and we're left with 210.
Fetch the next digit (2) from the dividend, attach it to 210 and continue: 2102 / 631

Let's proceed to step 4:
The number 631 fits into 2102 3 times, leaving a remainder of 209.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 1893 from 2102, we get 209.
Take the next digit (8) from the dividend and append it to 209, then repeat: 2098 / 631

Step 5:
If we divide 2098 by 631, we get 3 and a remainder of 205.
Use 3 as the next digit of our solution. 
Result so far: 33.0
Deduct 1893 from 2098 and we're left with 205.
Grab the next digit (8) from the dividend, add it to 205, then carry on: 2058 / 631

Going ahead to step 6:
If we divide 2058 by 631, we get 3 and a remainder of 165.
Use 3 as the next digit of our solution. 
Result so far: 333.0
If we take 1893 away from 2058, we end up with 165.
Append the next digit (9) from the dividend to 165 and continue with: 1659 / 631

Let's proceed to step 7:
631 goes into 1659 2 times with a remainder of 397.
The number 2 becomes the next digit in our result. 
Result so far: 3332.0
Deduct 1262 from 1659 and we're left with 397.
Fetch the next digit (3) from the dividend, attach it to 397 and continue: 3973 / 631

Advancing to step 8:
When dividing 3973 by 631, we get 6 with a remainder of 187.
The next digit of our result is 6. 
Result so far: 33326.0
Subtracting 3786 from 3973 leaves us with 187.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1870, and continue the process.

Moving on to step 9:
631 can be fit into 1870 2 times, resulting in a remainder of 608.
Put 2 as the next digit of the answer. 
Result so far: 33326.2
Subtract 1262 from 1870 to get 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

Step 10:
The number 631 fits into 6080 9 times, leaving a remainder of 401.
Record the quotient 9 as the next digit in the result. 
Result so far: 33326.29
Deduct 5679 from 6080 and we're left with 401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4010, and continue the process.

Let's proceed to step 11:
When dividing 4010 by 631, we get 6 with a remainder of 224.
The next digit of our result is 6. 
Result so far: 33326.296
Subtract 3786 from 4010 to get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Moving on to step 12:
631 can be fit into 2240 3 times, resulting in a remainder of 347.
Write down 3 as next digit of the result. 
Result so far: 33326.2963
If we subtract 1893 from 2240, we get 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

Going ahead to step 13:
631 goes into 3470 5 times with a remainder of 315.
Use 5 as the next digit of our solution. 
Result so far: 33326.29635
Subtracting 3155 from 3470 leaves us with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Moving on to step 14:
When dividing 3150 by 631, we get 4 with a remainder of 626.
Write down 4 as next digit of the result. 
Result so far: 33326.296354
Subtract 2524 from 3150 to get 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Moving on to step 15:
631 can be fit into 6260 9 times, resulting in a remainder of 581.
Use 9 as the next digit of our solution. 
Result so far: 33326.2963549
If we subtract 5679 from 6260, we get 581.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5810, and continue the process.

Going ahead to step 16:
When dividing 5810 by 631, we get 9 with a remainder of 131.
Record the quotient 9 as the next digit in the result. 
Result so far: 33326.29635499
Subtracting 5679 from 5810 leaves us with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

After the division, we end up with 33326.29635499 and a remainder of 1.31e-07.