637219 divided by 7 
The aim is to understand the frequency of 7 in 637219.

On to step 1:
7 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 7

Let's proceed to step 2:
If we divide 63 by 7, we get 9 and a remainder of 0.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 63 from 63 and we're left with 0.
Bring next digit (7) of the dividend behind the 0 and repeat the process: 7 / 7

Moving on to step 3:
The number 7 fits into 7 1 times, leaving a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 91.0
The remainder is 0 after subtracting 7 from 7.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 7

Moving on to step 4:
If we divide 2 by 7, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 910.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 7

On to step 5:
7 goes into 21 3 times with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 9103.0
Deduct 21 from 21 and we're left with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 7

Step 6:
The number 7 fits into 9 1 times, leaving a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 91031.0
If we take 7 away from 9, 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 7:
20 divided by 7 is 2 with a remainder of 6.
The next digit of our result is 2. 
Result so far: 91031.2
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.

On to step 8:
7 can be fit into 60 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 91031.28
The remainder is 4 after subtracting 56 from 60.
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 9:
40 divided by 7 is 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 91031.285
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.

On to step 10:
When dividing 50 by 7, we get 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 91031.2857
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.

Advancing to step 11:
If we divide 10 by 7, we get 1 and a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 91031.28571
Deduct 7 from 10 and we're left 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:
7 goes into 30 4 times with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 91031.285714
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.

Let's proceed to step 13:
When dividing 20 by 7, we get 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 91031.2857142
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.

Let's proceed to step 14:
When dividing 60 by 7, we get 8 with a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 91031.28571428
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.

The final result is 91031.28571428 with a remainder of 4e-09.