We're dividing 143975 by 69 
The aim is to understand the frequency of 69 in 143975.

Step 1:
69 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 69

Moving on to step 2:
69 can be fit into 14 0 times, resulting in a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 14, we get 14.
Include the next digit (3) from the dividend after 14, then repeat: 143 / 69

Moving on to step 3:
69 goes into 143 2 times with a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 138 away from 143, we end up with 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 69

Going ahead to step 4:
If we divide 59 by 69, we get 0 and a remainder of 59.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Deduct 0 from 59 and we're left with 59.
Include the next digit (7) from the dividend after 59, then repeat: 597 / 69

Going ahead to step 5:
The number 69 fits into 597 8 times, leaving a remainder of 45.
Record the quotient 8 as the next digit in the result. 
Result so far: 208.0
Deduct 552 from 597 and we're left with 45.
Fetch the next digit (5) from the dividend, attach it to 45 and continue: 455 / 69

On to step 6:
When dividing 455 by 69, we get 6 with a remainder of 41.
The next digit of our result is 6. 
Result so far: 2086.0
Deduct 414 from 455 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 7:
When dividing 410 by 69, we get 5 with a remainder of 65.
Write down 5 as next digit of the result. 
Result so far: 2086.5
If we take 345 away from 410, we end up with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Let's proceed to step 8:
If we divide 650 by 69, we get 9 and a remainder of 29.
Write down 9 as next digit of the result. 
Result so far: 2086.59
Deduct 621 from 650 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 9:
When dividing 290 by 69, we get 4 with a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 2086.594
Deduct 276 from 290 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 10:
When dividing 140 by 69, we get 2 with a remainder of 2.
The next digit of our result is 2. 
Result so far: 2086.5942
Subtracting 138 from 140 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 11:
When dividing 20 by 69, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 2086.5942
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 12:
200 divided by 69 is 2 with a remainder of 62.
Write down 2 as next digit of the result. 
Result so far: 2086.594202
Subtracting 138 from 200 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 13:
69 can be fit into 620 8 times, resulting in a remainder of 68.
Use 8 as the next digit of our solution. 
Result so far: 2086.5942028
Subtracting 552 from 620 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 14:
If we divide 680 by 69, we get 9 and a remainder of 59.
Use 9 as the next digit of our solution. 
Result so far: 2086.59420289
Subtracting 621 from 680 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

The final outcome is 2086.59420289, with a leftover of 5.9e-08.