We're dividing 537522 by 7 
The aim is to understand the frequency of 7 in 537522.

Advancing to step 1:
The number 7 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 7

On to step 2:
7 can be fit into 53 7 times, resulting in a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 49 from 53 and we're left with 4.
Grab the next digit (7) from the dividend, add it to 4, then carry on: 47 / 7

Step 3:
The number 7 fits into 47 6 times, leaving a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 76.0
If we subtract 42 from 47, we get 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 7

Going ahead to step 4:
55 divided by 7 is 7 with a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 767.0
Subtract 49 from 55 to get 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 7

Advancing to step 5:
7 can be fit into 62 8 times, resulting in a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 7678.0
If we subtract 56 from 62, we get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 7

Let's proceed to step 6:
62 divided by 7 is 8 with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 76788.0
Subtract 56 from 62 to 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.

Going ahead to step 7:
7 goes into 60 8 times with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 76788.8
The remainder is 4 after subtracting 56 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 8:
The number 7 fits into 40 5 times, leaving a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 76788.85
If we take 35 away from 40, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 9:
The number 7 fits into 50 7 times, leaving a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 76788.857
If we take 49 away from 50, we end up 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.

On to step 10:
The number 7 fits into 10 1 times, leaving a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 76788.8571
Subtracting 7 from 10 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 11:
30 divided by 7 is 4 with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 76788.85714
Subtracting 28 from 30 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 12:
7 goes into 20 2 times with a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 76788.857142
If we take 14 away from 20, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 13:
7 goes into 60 8 times with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 76788.8571428
If we take 56 away from 60, we end up 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.

Going ahead to step 14:
40 divided by 7 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 76788.85714285
If we take 35 away from 40, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Our division results in 76788.85714285 with a remaining 5e-09.