81224733 divided by 840 
The aim is to understand the frequency of 840 in 81224733.

Going ahead to step 1:
When dividing 8 by 840, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 840

Going ahead to step 2:
81 divided by 840 is 0 with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Fetch the next digit (2) from the dividend, attach it to 81 and continue: 812 / 840

Moving on to step 3:
The number 840 fits into 812 0 times, leaving a remainder of 812.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 812 leaves us with 812.
Fetch the next digit (2) from the dividend, attach it to 812 and continue: 8122 / 840

Let's proceed to step 4:
840 can be fit into 8122 9 times, resulting in a remainder of 562.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtracting 7560 from 8122 leaves us with 562.
Take the next digit (4) from the dividend and append it to 562, then repeat: 5624 / 840

Step 5:
840 can be fit into 5624 6 times, resulting in a remainder of 584.
Use 6 as the next digit of our solution. 
Result so far: 96.0
The remainder is 584 after subtracting 5040 from 5624.
Take the next digit (7) from the dividend and append it to 584, then repeat: 5847 / 840

Moving on to step 6:
The number 840 fits into 5847 6 times, leaving a remainder of 807.
Use 6 as the next digit of our solution. 
Result so far: 966.0
Subtract 5040 from 5847 to get 807.
Bring next digit (3) of the dividend behind the 807 and repeat the process: 8073 / 840

Going ahead to step 7:
840 can be fit into 8073 9 times, resulting in a remainder of 513.
The number 9 becomes the next digit in our result. 
Result so far: 9669.0
Deduct 7560 from 8073 and we're left with 513.
Append the next digit (3) from the dividend to 513 and continue with: 5133 / 840

Going ahead to step 8:
840 goes into 5133 6 times with a remainder of 93.
Put 6 as the next digit of the answer. 
Result so far: 96696.0
Deduct 5040 from 5133 and we're left with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Let's proceed to step 9:
840 goes into 930 1 times with a remainder of 90.
The next digit of our result is 1. 
Result so far: 96696.1
Subtracting 840 from 930 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Step 10:
When dividing 900 by 840, we get 1 with a remainder of 60.
Put 1 as the next digit of the answer. 
Result so far: 96696.11
Deduct 840 from 900 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Our division results in 96696.11 with a remaining 0.06.