We're dividing 73186590 by 216 
The aim is to understand the frequency of 216 in 73186590.

Step 1:
216 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (3) of the dividend behind the 7 and repeat the process: 73 / 216

Going ahead to step 2:
When dividing 73 by 216, we get 0 with a remainder of 73.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 73, we get 73.
Fetch the next digit (1) from the dividend, attach it to 73 and continue: 731 / 216

Step 3:
When dividing 731 by 216, we get 3 with a remainder of 83.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 648 from 731 and we're left with 83.
Bring next digit (8) of the dividend behind the 83 and repeat the process: 838 / 216

Let's proceed to step 4:
When dividing 838 by 216, we get 3 with a remainder of 190.
The next digit of our result is 3. 
Result so far: 33.0
The remainder is 190 after subtracting 648 from 838.
Take the next digit (6) from the dividend and append it to 190, then repeat: 1906 / 216

Moving on to step 5:
216 goes into 1906 8 times with a remainder of 178.
Put 8 as the next digit of the answer. 
Result so far: 338.0
If we take 1728 away from 1906, we end up with 178.
Append the next digit (5) from the dividend to 178 and continue with: 1785 / 216

Going ahead to step 6:
When dividing 1785 by 216, we get 8 with a remainder of 57.
Write down 8 as next digit of the result. 
Result so far: 3388.0
If we take 1728 away from 1785, we end up with 57.
Append the next digit (9) from the dividend to 57 and continue with: 579 / 216

Going ahead to step 7:
216 can be fit into 579 2 times, resulting in a remainder of 147.
Put 2 as the next digit of the answer. 
Result so far: 33882.0
Deduct 432 from 579 and we're left with 147.
Include the next digit (0) from the dividend after 147, then repeat: 1470 / 216

Moving on to step 8:
The number 216 fits into 1470 6 times, leaving a remainder of 174.
Write down 6 as next digit of the result. 
Result so far: 338826.0
Subtracting 1296 from 1470 leaves us with 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

Advancing to step 9:
216 can be fit into 1740 8 times, resulting in a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 338826.8
If we take 1728 away from 1740, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 10:
216 goes into 120 0 times with a remainder of 120.
Put 0 as the next digit of the answer. 
Result so far: 338826.8
Subtracting 0 from 120 leaves us with 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 11:
When dividing 1200 by 216, we get 5 with a remainder of 120.
Use 5 as the next digit of our solution. 
Result so far: 338826.805
Subtracting 1080 from 1200 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 12:
216 goes into 1200 5 times with a remainder of 120.
Put 5 as the next digit of the answer. 
Result so far: 338826.8055
Subtracting 1080 from 1200 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

The quotient of the division is 338826.8055, and the remainder is 0.0012.