33943514 ÷ 639 
The aim is to understand the frequency of 639 in 33943514.

Advancing to step 1:
639 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 639

Going ahead to step 2:
33 divided by 639 is 0 with a remainder of 33.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 33 and we're left with 33.
Take the next digit (9) from the dividend and append it to 33, then repeat: 339 / 639

Moving on to step 3:
If we divide 339 by 639, we get 0 and a remainder of 339.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 339 after subtracting 0 from 339.
Append the next digit (4) from the dividend to 339 and continue with: 3394 / 639

Advancing to step 4:
If we divide 3394 by 639, we get 5 and a remainder of 199.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 3195 from 3394 leaves us with 199.
Append the next digit (3) from the dividend to 199 and continue with: 1993 / 639

Step 5:
639 goes into 1993 3 times with a remainder of 76.
Write down 3 as next digit of the result. 
Result so far: 53.0
Subtract 1917 from 1993 to get 76.
Fetch the next digit (5) from the dividend, attach it to 76 and continue: 765 / 639

Moving on to step 6:
The number 639 fits into 765 1 times, leaving a remainder of 126.
Use 1 as the next digit of our solution. 
Result so far: 531.0
Deduct 639 from 765 and we're left with 126.
Fetch the next digit (1) from the dividend, attach it to 126 and continue: 1261 / 639

Advancing to step 7:
When dividing 1261 by 639, we get 1 with a remainder of 622.
Write down 1 as next digit of the result. 
Result so far: 5311.0
Deduct 639 from 1261 and we're left with 622.
Take the next digit (4) from the dividend and append it to 622, then repeat: 6224 / 639

Going ahead to step 8:
When dividing 6224 by 639, we get 9 with a remainder of 473.
Record the quotient 9 as the next digit in the result. 
Result so far: 53119.0
Subtracting 5751 from 6224 leaves us with 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

Going ahead to step 9:
4730 divided by 639 is 7 with a remainder of 257.
The next digit of our result is 7. 
Result so far: 53119.7
Subtract 4473 from 4730 to get 257.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2570, and continue the process.

Advancing to step 10:
639 can be fit into 2570 4 times, resulting in a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 53119.74
Deduct 2556 from 2570 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 11:
140 divided by 639 is 0 with a remainder of 140.
Put 0 as the next digit of the answer. 
Result so far: 53119.74
The remainder is 140 after subtracting 0 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

On to step 12:
When dividing 1400 by 639, we get 2 with a remainder of 122.
Record the quotient 2 as the next digit in the result. 
Result so far: 53119.7402
The remainder is 122 after subtracting 1278 from 1400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Let's proceed to step 13:
639 goes into 1220 1 times with a remainder of 581.
Use 1 as the next digit of our solution. 
Result so far: 53119.74021
Subtracting 639 from 1220 leaves us with 581.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5810, and continue the process.

Step 14:
639 goes into 5810 9 times with a remainder of 59.
Use 9 as the next digit of our solution. 
Result so far: 53119.740219
Subtract 5751 from 5810 to get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Let's proceed to step 15:
The number 639 fits into 590 0 times, leaving a remainder of 590.
Record the quotient 0 as the next digit in the result. 
Result so far: 53119.740219
The remainder is 590 after subtracting 0 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

On to step 16:
5900 divided by 639 is 9 with a remainder of 149.
Put 9 as the next digit of the answer. 
Result so far: 53119.74021909
If we subtract 5751 from 5900, we get 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

The final outcome is 53119.74021909, with a leftover of 1.49e-07.