701544 ÷ 21 
The aim is to understand the frequency of 21 in 701544.

Step 1:
21 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 21

On to step 2:
If we divide 70 by 21, we get 3 and a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 63 from 70, we get 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 21

Advancing to step 3:
71 divided by 21 is 3 with a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 33.0
If we take 63 away from 71, we end up with 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 21

Advancing to step 4:
When dividing 85 by 21, we get 4 with a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 334.0
If we take 84 away from 85, we end up with 1.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 21

Let's proceed to step 5:
If we divide 14 by 21, we get 0 and a remainder of 14.
Write down 0 as next digit of the result. 
Result so far: 3340.0
Subtract 0 from 14 to get 14.
Append the next digit (4) from the dividend to 14 and continue with: 144 / 21

On to step 6:
21 goes into 144 6 times with a remainder of 18.
The next digit of our result is 6. 
Result so far: 33406.0
Deduct 126 from 144 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 7:
21 goes into 180 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 33406.8
Subtracting 168 from 180 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.

On to step 8:
If we divide 120 by 21, we get 5 and a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 33406.85
If we subtract 105 from 120, 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.

Step 9:
The number 21 fits into 150 7 times, leaving a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 33406.857
The remainder is 3 after subtracting 147 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 10:
21 goes into 30 1 times with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 33406.8571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 11:
If we divide 90 by 21, we get 4 and a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 33406.85714
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 12:
When dividing 60 by 21, we get 2 with a remainder of 18.
The next digit of our result is 2. 
Result so far: 33406.857142
Subtracting 42 from 60 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 13:
When dividing 180 by 21, we get 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 33406.8571428
The remainder is 12 after subtracting 168 from 180.
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 21, we get 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 33406.85714285
If we subtract 105 from 120, 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.

The quotient of the division is 33406.85714285, and the remainder is 1.5e-08.