646539 ÷ 219 
The aim is to understand the frequency of 219 in 646539.

On to step 1:
The number 219 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 219

Advancing to step 2:
When dividing 64 by 219, we get 0 with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Take the next digit (6) from the dividend and append it to 64, then repeat: 646 / 219

Moving on to step 3:
646 divided by 219 is 2 with a remainder of 208.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 208 after subtracting 438 from 646.
Append the next digit (5) from the dividend to 208 and continue with: 2085 / 219

Let's proceed to step 4:
219 goes into 2085 9 times with a remainder of 114.
Use 9 as the next digit of our solution. 
Result so far: 29.0
Subtract 1971 from 2085 to get 114.
Bring next digit (3) of the dividend behind the 114 and repeat the process: 1143 / 219

Let's proceed to step 5:
219 goes into 1143 5 times with a remainder of 48.
Write down 5 as next digit of the result. 
Result so far: 295.0
Subtracting 1095 from 1143 leaves us with 48.
Fetch the next digit (9) from the dividend, attach it to 48 and continue: 489 / 219

On to step 6:
219 goes into 489 2 times with a remainder of 51.
The next digit of our result is 2. 
Result so far: 2952.0
Subtracting 438 from 489 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 7:
The number 219 fits into 510 2 times, leaving a remainder of 72.
The next digit of our result is 2. 
Result so far: 2952.2
Subtracting 438 from 510 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 8:
219 can be fit into 720 3 times, resulting in a remainder of 63.
Put 3 as the next digit of the answer. 
Result so far: 2952.23
Deduct 657 from 720 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 9:
If we divide 630 by 219, we get 2 and a remainder of 192.
The next digit of our result is 2. 
Result so far: 2952.232
Deduct 438 from 630 and we're left with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Moving on to step 10:
219 can be fit into 1920 8 times, resulting in a remainder of 168.
Use 8 as the next digit of our solution. 
Result so far: 2952.2328
Subtracting 1752 from 1920 leaves us with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Let's proceed to step 11:
When dividing 1680 by 219, we get 7 with a remainder of 147.
Put 7 as the next digit of the answer. 
Result so far: 2952.23287
If we subtract 1533 from 1680, we get 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Moving on to step 12:
219 can be fit into 1470 6 times, resulting in a remainder of 156.
The number 6 becomes the next digit in our result. 
Result so far: 2952.232876
If we subtract 1314 from 1470, we get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Moving on to step 13:
If we divide 1560 by 219, we get 7 and a remainder of 27.
Write down 7 as next digit of the result. 
Result so far: 2952.2328767
Subtract 1533 from 1560 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 14:
270 divided by 219 is 1 with a remainder of 51.
Use 1 as the next digit of our solution. 
Result so far: 2952.23287671
The remainder is 51 after subtracting 219 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

After the division, we end up with 2952.23287671 and a remainder of 5.1e-08.