Let's divide 153661 by 2
The aim is to understand the frequency of 2 in 153661.

Step 1:
2 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 2

Step 2:
2 can be fit into 15 7 times, resulting in a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 14 away from 15, we end up with 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 2

On to step 3:
The number 2 fits into 13 6 times, leaving a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 76.0
Deduct 12 from 13 and we're left with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 2

Going ahead to step 4:
The number 2 fits into 16 8 times, leaving a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 768.0
Deduct 16 from 16 and we're left with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 2

Step 5:
2 can be fit into 6 3 times, resulting in a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 7683.0
Subtract 6 from 6 to get 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 2

On to step 6:
If we divide 1 by 2, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 76830.0
Subtracting 0 from 1 leaves us 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 7:
If we divide 10 by 2, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 76830.5
Deduct 10 from 10 and we're left 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.

Moving on to step 8:
2 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 76830.5
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.

Going ahead to step 9:
If we divide 0 by 2, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 76830.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 76830.5 and a remainder of 0.0.