Let's divide 602221 by 7
The aim is to understand the frequency of 7 in 602221.

Step 1:
6 divided by 7 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (0) from the dividend and append it to 6, then repeat: 60 / 7

Moving on to step 2:
7 can be fit into 60 8 times, resulting in a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtracting 56 from 60 leaves us with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 7

On to step 3:
7 can be fit into 42 6 times, resulting in a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 86.0
Deduct 42 from 42 and we're left with 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 7

Let's proceed to step 4:
The number 7 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 860.0
If we subtract 0 from 2, we get 2.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 7

Moving on to step 5:
7 can be fit into 22 3 times, resulting in a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 8603.0
The remainder is 1 after subtracting 21 from 22.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 7

Moving on to step 6:
7 can be fit into 11 1 times, resulting in a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 86031.0
Subtracting 7 from 11 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 7:
40 divided by 7 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 86031.5
The remainder is 5 after subtracting 35 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 8:
When dividing 50 by 7, we get 7 with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 86031.57
Deduct 49 from 50 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
7 goes into 10 1 times with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 86031.571
The remainder is 3 after subtracting 7 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 10:
The number 7 fits into 30 4 times, leaving a remainder of 2.
The next digit of our result is 4. 
Result so far: 86031.5714
If we subtract 28 from 30, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 11:
The number 7 fits into 20 2 times, leaving a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 86031.57142
The remainder is 6 after subtracting 14 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 12:
If we divide 60 by 7, we get 8 and a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 86031.571428
Subtract 56 from 60 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 13:
40 divided by 7 is 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 86031.5714285
If we subtract 35 from 40, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 14:
7 goes into 50 7 times with a remainder of 1.
The next digit of our result is 7. 
Result so far: 86031.57142857
Subtract 49 from 50 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 86031.57142857, with a leftover of 1e-09.