We look at the division of 883800 by 7 
The aim is to understand the frequency of 7 in 883800.

Moving on to step 1:
When dividing 8 by 7, we get 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 1 after subtracting 7 from 8.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 7

Let's proceed to step 2:
If we divide 18 by 7, we get 2 and a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtracting 14 from 18 leaves us with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 7

On to step 3:
When dividing 43 by 7, we get 6 with a remainder of 1.
Put 6 as the next digit of the answer. 
Result so far: 126.0
Subtract 42 from 43 to get 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 7

Moving on to step 4:
The number 7 fits into 18 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 1262.0
Subtract 14 from 18 to get 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 7

Step 5:
If we divide 40 by 7, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 12625.0
Deduct 35 from 40 and we're left with 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 7

On to step 6:
When dividing 50 by 7, we get 7 with a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 126257.0
The remainder is 1 after subtracting 49 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
When dividing 10 by 7, we get 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 126257.1
If we subtract 7 from 10, we 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.

Advancing to step 8:
7 goes into 30 4 times with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 126257.14
Subtracting 28 from 30 leaves us 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.

Let's proceed to step 9:
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: 126257.142
Deduct 14 from 20 and we're left 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.

Step 10:
60 divided by 7 is 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 126257.1428
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.

Moving on to step 11:
40 divided by 7 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 126257.14285
Subtracting 35 from 40 leaves us 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:
7 goes into 50 7 times with a remainder of 1.
The next digit of our result is 7. 
Result so far: 126257.142857
If we subtract 49 from 50, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 13:
The number 7 fits into 10 1 times, leaving a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 126257.1428571
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.

Advancing to step 14:
When dividing 30 by 7, we get 4 with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 126257.14285714
Subtracting 28 from 30 leaves us 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.

After the division, we end up with 126257.14285714 and a remainder of 2e-09.