61512285 divided by 161 
The aim is to understand the frequency of 161 in 61512285.

On to step 1:
The number 161 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 161

On to step 2:
161 can be fit into 61 0 times, resulting in a remainder of 61.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 61 after subtracting 0 from 61.
Bring next digit (5) of the dividend behind the 61 and repeat the process: 615 / 161

Advancing to step 3:
If we divide 615 by 161, we get 3 and a remainder of 132.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 483 away from 615, we end up with 132.
Grab the next digit (1) from the dividend, add it to 132, then carry on: 1321 / 161

Advancing to step 4:
161 can be fit into 1321 8 times, resulting in a remainder of 33.
Use 8 as the next digit of our solution. 
Result so far: 38.0
If we subtract 1288 from 1321, we get 33.
Take the next digit (2) from the dividend and append it to 33, then repeat: 332 / 161

Let's proceed to step 5:
If we divide 332 by 161, we get 2 and a remainder of 10.
The next digit of our result is 2. 
Result so far: 382.0
The remainder is 10 after subtracting 322 from 332.
Bring next digit (2) of the dividend behind the 10 and repeat the process: 102 / 161

Advancing to step 6:
102 divided by 161 is 0 with a remainder of 102.
Write down 0 as next digit of the result. 
Result so far: 3820.0
The remainder is 102 after subtracting 0 from 102.
Grab the next digit (8) from the dividend, add it to 102, then carry on: 1028 / 161

Moving on to step 7:
The number 161 fits into 1028 6 times, leaving a remainder of 62.
The number 6 becomes the next digit in our result. 
Result so far: 38206.0
If we subtract 966 from 1028, we get 62.
Take the next digit (5) from the dividend and append it to 62, then repeat: 625 / 161

Step 8:
161 can be fit into 625 3 times, resulting in a remainder of 142.
Put 3 as the next digit of the answer. 
Result so far: 382063.0
If we take 483 away from 625, 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.

Step 9:
When dividing 1420 by 161, we get 8 with a remainder of 132.
Put 8 as the next digit of the answer. 
Result so far: 382063.8
Subtract 1288 from 1420 to get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Going ahead to step 10:
1320 divided by 161 is 8 with a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 382063.88
If we subtract 1288 from 1320, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The quotient of the division is 382063.88, and the remainder is 0.032.