We look at the division of 387505 by 7 
The aim is to understand the frequency of 7 in 387505.

Going ahead to step 1:
3 divided by 7 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 7

Moving on to step 2:
The number 7 fits into 38 5 times, leaving a remainder of 3.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 35 from 38 leaves us with 3.
Append the next digit (7) from the dividend to 3 and continue with: 37 / 7

Advancing to step 3:
When dividing 37 by 7, we get 5 with a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 55.0
Deduct 35 from 37 and we're left with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 7

Moving on to step 4:
7 can be fit into 25 3 times, resulting in a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 553.0
If we take 21 away from 25, we end up with 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 7

On to step 5:
The number 7 fits into 40 5 times, leaving a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 5535.0
Deduct 35 from 40 and we're left with 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 7

On to step 6:
7 goes into 55 7 times with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 55357.0
If we subtract 49 from 55, 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.

Advancing to step 7:
60 divided by 7 is 8 with a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 55357.8
Subtracting 56 from 60 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 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: 55357.85
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 9:
7 can be fit into 50 7 times, resulting in a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 55357.857
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.

Let's proceed to step 10:
7 goes into 10 1 times with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 55357.8571
Subtract 7 from 10 to get 3.
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 11:
7 goes into 30 4 times with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 55357.85714
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.

Step 12:
7 goes into 20 2 times with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 55357.857142
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:
60 divided by 7 is 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 55357.8571428
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.

On to step 14:
If we divide 40 by 7, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 55357.85714285
Subtract 35 from 40 to 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.

In conclusion, the division gives 55357.85714285 with a balance of 5e-09.