We divide 428903 by 7
The aim is to understand the frequency of 7 in 428903.

Let's proceed to step 1:
When dividing 4 by 7, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 7

Let's proceed to step 2:
42 divided by 7 is 6 with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Deduct 42 from 42 and we're left with 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 7

Advancing to step 3:
7 can be fit into 8 1 times, resulting in a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 61.0
If we subtract 7 from 8, we get 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 7

Let's proceed to step 4:
7 can be fit into 19 2 times, resulting in a remainder of 5.
The next digit of our result is 2. 
Result so far: 612.0
Deduct 14 from 19 and we're left with 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 7

Advancing to step 5:
7 can be fit into 50 7 times, resulting in a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 6127.0
If we subtract 49 from 50, we get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 7

Advancing to step 6:
13 divided by 7 is 1 with a remainder of 6.
The next digit of our result is 1. 
Result so far: 61271.0
If we take 7 away from 13, 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 7:
If we divide 60 by 7, we get 8 and a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 61271.8
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 8:
The number 7 fits into 40 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 61271.85
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:
50 divided by 7 is 7 with a remainder of 1.
The next digit of our result is 7. 
Result so far: 61271.857
Subtracting 49 from 50 leaves us 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.

Let's proceed to step 10:
The number 7 fits into 10 1 times, leaving a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 61271.8571
If we take 7 away from 10, we end up 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.
Record the quotient 4 as the next digit in the result. 
Result so far: 61271.85714
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.

Let's proceed to step 12:
7 can be fit into 20 2 times, resulting in a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 61271.857142
Subtracting 14 from 20 leaves us 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 13:
7 goes into 60 8 times with a remainder of 4.
The next digit of our result is 8. 
Result so far: 61271.8571428
If we subtract 56 from 60, we 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.

Step 14:
If we divide 40 by 7, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 61271.85714285
Deduct 35 from 40 and we're left 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 61271.85714285 with a remaining 5e-09.