We look at the division of 84857626 by 7 
The aim is to understand the frequency of 7 in 84857626.

Step 1:
8 divided by 7 is 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 7 from 8 leaves us with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 7

On to step 2:
If we divide 14 by 7, we get 2 and a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 14 from 14, we get 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 7

Moving on to step 3:
If we divide 8 by 7, we get 1 and a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 121.0
The remainder is 1 after subtracting 7 from 8.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 7

Going ahead to step 4:
The number 7 fits into 15 2 times, leaving a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 1212.0
Subtract 14 from 15 to get 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 7

Step 5:
7 can be fit into 17 2 times, resulting in a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 12122.0
Deduct 14 from 17 and we're left with 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 7

On to step 6:
The number 7 fits into 36 5 times, leaving a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 121225.0
Subtract 35 from 36 to get 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 7

Let's proceed to step 7:
When dividing 12 by 7, we get 1 with a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 1212251.0
Deduct 7 from 12 and we're left with 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 7

Let's proceed to step 8:
56 divided by 7 is 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 12122518.0
The remainder is 0 after subtracting 56 from 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
The number 7 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 12122518.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
0 divided by 7 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 12122518.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 12122518.0, and the remainder is 0.0.