We're dividing 737403 by 7 
The aim is to understand the frequency of 7 in 737403.

Advancing to step 1:
7 divided by 7 is 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 7 from 7 to get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 7

Going ahead to step 2:
3 divided by 7 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 10.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 7

Advancing to step 3:
The number 7 fits into 37 5 times, leaving a remainder of 2.
The next digit of our result is 5. 
Result so far: 105.0
The remainder is 2 after subtracting 35 from 37.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 7

On to step 4:
24 divided by 7 is 3 with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 1053.0
Deduct 21 from 24 and we're left with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 7

Going ahead to step 5:
7 can be fit into 30 4 times, resulting in a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 10534.0
The remainder is 2 after subtracting 28 from 30.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 7

Advancing to step 6:
The number 7 fits into 23 3 times, leaving a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 105343.0
Subtract 21 from 23 to 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.

Step 7:
When dividing 20 by 7, we get 2 with a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 105343.2
If we subtract 14 from 20, we 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.

Let's proceed to step 8:
7 goes into 60 8 times with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 105343.28
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.

Moving on to step 9:
7 can be fit into 40 5 times, resulting in a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 105343.285
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 10:
If we divide 50 by 7, we get 7 and a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 105343.2857
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.

Moving on to step 11:
7 can be fit into 10 1 times, resulting in a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 105343.28571
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.

Let's proceed to step 12:
If we divide 30 by 7, we get 4 and a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 105343.285714
Subtract 28 from 30 to 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 13:
If we divide 20 by 7, we get 2 and a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 105343.2857142
Subtract 14 from 20 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 14:
7 can be fit into 60 8 times, resulting in a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 105343.28571428
Deduct 56 from 60 and we're left 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.

After the division, we end up with 105343.28571428 and a remainder of 4e-09.