902550 ÷ 7 
The aim is to understand the frequency of 7 in 902550.

Let's proceed to step 1:
7 can be fit into 9 1 times, resulting in a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 7 away from 9, we end up with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 7

Let's proceed to step 2:
If we divide 20 by 7, we get 2 and a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 14 from 20, we get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 7

Moving on to step 3:
7 goes into 62 8 times with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 128.0
Subtract 56 from 62 to get 6.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 7

Moving on to step 4:
65 divided by 7 is 9 with a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 1289.0
If we take 63 away from 65, we end up with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 7

Step 5:
When dividing 25 by 7, we get 3 with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 12893.0
Subtracting 21 from 25 leaves us with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 7

Moving on to step 6:
40 divided by 7 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 128935.0
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.

Advancing to step 7:
50 divided by 7 is 7 with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 128935.7
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.

Advancing to step 8:
The number 7 fits into 10 1 times, leaving a remainder of 3.
The next digit of our result is 1. 
Result so far: 128935.71
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.

Advancing to step 9:
If we divide 30 by 7, we get 4 and a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 128935.714
Deduct 28 from 30 and we're left 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.

Let's proceed to step 10:
The number 7 fits into 20 2 times, leaving a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 128935.7142
Deduct 14 from 20 and we're left 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.

Let's proceed to step 11:
7 goes into 60 8 times with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 128935.71428
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.

Moving on to step 12:
7 goes into 40 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 128935.714285
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.

On to step 13:
50 divided by 7 is 7 with a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 128935.7142857
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.

Moving on to step 14:
The number 7 fits into 10 1 times, leaving a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 128935.71428571
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.

Our division results in 128935.71428571 with a remaining 3e-09.