630601 divided by 78 
The aim is to understand the frequency of 78 in 630601.

On to step 1:
When dividing 6 by 78, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 78

Step 2:
78 can be fit into 63 0 times, resulting in a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 63 to get 63.
Fetch the next digit (0) from the dividend, attach it to 63 and continue: 630 / 78

Step 3:
78 goes into 630 8 times with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 624 from 630, we get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 78

Let's proceed to step 4:
If we divide 66 by 78, we get 0 and a remainder of 66.
The next digit of our result is 0. 
Result so far: 80.0
Subtract 0 from 66 to get 66.
Include the next digit (0) from the dividend after 66, then repeat: 660 / 78

Moving on to step 5:
78 can be fit into 660 8 times, resulting in a remainder of 36.
Record the quotient 8 as the next digit in the result. 
Result so far: 808.0
Subtract 624 from 660 to get 36.
Append the next digit (1) from the dividend to 36 and continue with: 361 / 78

On to step 6:
78 can be fit into 361 4 times, resulting in a remainder of 49.
Write down 4 as next digit of the result. 
Result so far: 8084.0
If we take 312 away from 361, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 7:
If we divide 490 by 78, we get 6 and a remainder of 22.
Use 6 as the next digit of our solution. 
Result so far: 8084.6
The remainder is 22 after subtracting 468 from 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 8:
When dividing 220 by 78, we get 2 with a remainder of 64.
Write down 2 as next digit of the result. 
Result so far: 8084.62
Subtracting 156 from 220 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 9:
78 can be fit into 640 8 times, resulting in a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 8084.628
If we take 624 away from 640, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 10:
If we divide 160 by 78, we get 2 and a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 8084.6282
If we subtract 156 from 160, 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.

Advancing to step 11:
78 can be fit into 40 0 times, resulting in a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 8084.6282
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 12:
The number 78 fits into 400 5 times, leaving a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 8084.628205
Deduct 390 from 400 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 13:
78 can be fit into 100 1 times, resulting in a remainder of 22.
Record the quotient 1 as the next digit in the result. 
Result so far: 8084.6282051
Subtract 78 from 100 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 14:
If we divide 220 by 78, we get 2 and a remainder of 64.
Record the quotient 2 as the next digit in the result. 
Result so far: 8084.62820512
Deduct 156 from 220 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final outcome is 8084.62820512, with a leftover of 6.4e-08.