We're dividing 35720063 by 161 
The aim is to understand the frequency of 161 in 35720063.

Going ahead to step 1:
161 can be fit into 3 0 times, resulting in a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 161

Let's proceed to step 2:
35 divided by 161 is 0 with a remainder of 35.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 35, we end up with 35.
Include the next digit (7) from the dividend after 35, then repeat: 357 / 161

Let's proceed to step 3:
If we divide 357 by 161, we get 2 and a remainder of 35.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 35 after subtracting 322 from 357.
Fetch the next digit (2) from the dividend, attach it to 35 and continue: 352 / 161

Going ahead to step 4:
161 goes into 352 2 times with a remainder of 30.
Write down 2 as next digit of the result. 
Result so far: 22.0
If we take 322 away from 352, we end up with 30.
Include the next digit (0) from the dividend after 30, then repeat: 300 / 161

Step 5:
161 can be fit into 300 1 times, resulting in a remainder of 139.
Use 1 as the next digit of our solution. 
Result so far: 221.0
The remainder is 139 after subtracting 161 from 300.
Take the next digit (0) from the dividend and append it to 139, then repeat: 1390 / 161

Going ahead to step 6:
1390 divided by 161 is 8 with a remainder of 102.
The number 8 becomes the next digit in our result. 
Result so far: 2218.0
Deduct 1288 from 1390 and we're left with 102.
Fetch the next digit (6) from the dividend, attach it to 102 and continue: 1026 / 161

Advancing to step 7:
161 goes into 1026 6 times with a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 22186.0
Subtract 966 from 1026 to get 60.
Append the next digit (3) from the dividend to 60 and continue with: 603 / 161

Moving on to step 8:
The number 161 fits into 603 3 times, leaving a remainder of 120.
Use 3 as the next digit of our solution. 
Result so far: 221863.0
Subtract 483 from 603 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 9:
1200 divided by 161 is 7 with a remainder of 73.
Put 7 as the next digit of the answer. 
Result so far: 221863.7
Subtracting 1127 from 1200 leaves us with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Let's proceed to step 10:
If we divide 730 by 161, we get 4 and a remainder of 86.
Write down 4 as next digit of the result. 
Result so far: 221863.74
Subtract 644 from 730 to get 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 11:
The number 161 fits into 860 5 times, leaving a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 221863.745
Deduct 805 from 860 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Going ahead to step 12:
550 divided by 161 is 3 with a remainder of 67.
Use 3 as the next digit of our solution. 
Result so far: 221863.7453
If we subtract 483 from 550, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

On to step 13:
If we divide 670 by 161, we get 4 and a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 221863.74534
Subtract 644 from 670 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 14:
The number 161 fits into 260 1 times, leaving a remainder of 99.
Use 1 as the next digit of our solution. 
Result so far: 221863.745341
Subtracting 161 from 260 leaves us with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Advancing to step 15:
990 divided by 161 is 6 with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 221863.7453416
If we subtract 966 from 990, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 16:
161 can be fit into 240 1 times, resulting in a remainder of 79.
The number 1 becomes the next digit in our result. 
Result so far: 221863.74534161
Subtracting 161 from 240 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

The final outcome is 221863.74534161, with a leftover of 7.9e-08.