We're dividing 151285 by 7 
The aim is to understand the frequency of 7 in 151285.

Step 1:
1 divided by 7 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 7

Moving on to step 2:
15 divided by 7 is 2 with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 14 from 15 leaves us with 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 7

Let's proceed to step 3:
11 divided by 7 is 1 with a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 21.0
Deduct 7 from 11 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 7

Going ahead to step 4:
7 can be fit into 42 6 times, resulting in a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 216.0
The remainder is 0 after subtracting 42 from 42.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 7

Going ahead to step 5:
When dividing 8 by 7, we get 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 2161.0
If we subtract 7 from 8, we get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 7

Advancing to step 6:
The number 7 fits into 15 2 times, leaving a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 21612.0
The remainder is 1 after subtracting 14 from 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
7 can be fit into 10 1 times, resulting in a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 21612.1
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.

Moving on to step 8:
If we divide 30 by 7, we get 4 and a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 21612.14
If we take 28 away from 30, we end up 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.

On to step 9:
20 divided by 7 is 2 with a remainder of 6.
The next digit of our result is 2. 
Result so far: 21612.142
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 10:
The number 7 fits into 60 8 times, leaving a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 21612.1428
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.

On to step 11:
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: 21612.14285
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 12:
If we divide 50 by 7, we get 7 and a remainder of 1.
The next digit of our result is 7. 
Result so far: 21612.142857
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 13:
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: 21612.1428571
The remainder is 3 after subtracting 7 from 10.
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 14:
30 divided by 7 is 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 21612.14285714
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.

The quotient of the division is 21612.14285714, and the remainder is 2e-09.