645234 ÷ 61 
The aim is to understand the frequency of 61 in 645234.

On to step 1:
The number 61 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 61

Moving on to step 2:
The number 61 fits into 64 1 times, leaving a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 3 after subtracting 61 from 64.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 61

Going ahead to step 3:
61 goes into 35 0 times with a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 10.0
The remainder is 35 after subtracting 0 from 35.
Grab the next digit (2) from the dividend, add it to 35, then carry on: 352 / 61

Step 4:
61 can be fit into 352 5 times, resulting in a remainder of 47.
Use 5 as the next digit of our solution. 
Result so far: 105.0
Subtracting 305 from 352 leaves us with 47.
Append the next digit (3) from the dividend to 47 and continue with: 473 / 61

Moving on to step 5:
61 goes into 473 7 times with a remainder of 46.
Record the quotient 7 as the next digit in the result. 
Result so far: 1057.0
Subtracting 427 from 473 leaves us with 46.
Grab the next digit (4) from the dividend, add it to 46, then carry on: 464 / 61

Let's proceed to step 6:
If we divide 464 by 61, we get 7 and a remainder of 37.
The next digit of our result is 7. 
Result so far: 10577.0
Subtract 427 from 464 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 7:
The number 61 fits into 370 6 times, leaving a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 10577.6
Deduct 366 from 370 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 8:
The number 61 fits into 40 0 times, leaving a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 10577.6
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
61 goes into 400 6 times with a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 10577.606
Deduct 366 from 400 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 10:
340 divided by 61 is 5 with a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 10577.6065
Subtract 305 from 340 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 11:
61 can be fit into 350 5 times, resulting in a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 10577.60655
If we take 305 away from 350, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final outcome is 10577.60655, with a leftover of 4.5e-05.