We're dividing 3788698 by 663 
The aim is to understand the frequency of 663 in 3788698.

Step 1:
663 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 663

Moving on to step 2:
When dividing 37 by 663, we get 0 with a remainder of 37.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 37 leaves us with 37.
Include the next digit (8) from the dividend after 37, then repeat: 378 / 663

Moving on to step 3:
If we divide 378 by 663, we get 0 and a remainder of 378.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 378 to get 378.
Fetch the next digit (8) from the dividend, attach it to 378 and continue: 3788 / 663

On to step 4:
The number 663 fits into 3788 5 times, leaving a remainder of 473.
The next digit of our result is 5. 
Result so far: 5.0
If we subtract 3315 from 3788, we get 473.
Include the next digit (6) from the dividend after 473, then repeat: 4736 / 663

Going ahead to step 5:
The number 663 fits into 4736 7 times, leaving a remainder of 95.
Record the quotient 7 as the next digit in the result. 
Result so far: 57.0
If we subtract 4641 from 4736, we get 95.
Grab the next digit (9) from the dividend, add it to 95, then carry on: 959 / 663

Advancing to step 6:
959 divided by 663 is 1 with a remainder of 296.
Use 1 as the next digit of our solution. 
Result so far: 571.0
Subtract 663 from 959 to get 296.
Include the next digit (8) from the dividend after 296, then repeat: 2968 / 663

On to step 7:
The number 663 fits into 2968 4 times, leaving a remainder of 316.
Use 4 as the next digit of our solution. 
Result so far: 5714.0
If we take 2652 away from 2968, we end up with 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

On to step 8:
The number 663 fits into 3160 4 times, leaving a remainder of 508.
Use 4 as the next digit of our solution. 
Result so far: 5714.4
If we subtract 2652 from 3160, we get 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Moving on to step 9:
5080 divided by 663 is 7 with a remainder of 439.
Write down 7 as next digit of the result. 
Result so far: 5714.47
Subtracting 4641 from 5080 leaves us with 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

Advancing to step 10:
The number 663 fits into 4390 6 times, leaving a remainder of 412.
The number 6 becomes the next digit in our result. 
Result so far: 5714.476
If we take 3978 away from 4390, we end up with 412.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

Let's proceed to step 11:
663 can be fit into 4120 6 times, resulting in a remainder of 142.
Put 6 as the next digit of the answer. 
Result so far: 5714.4766
If we take 3978 away from 4120, we end up with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Our division results in 5714.4766 with a remaining 0.00142.