We look at the division of 64686970 by 171 
The aim is to understand the frequency of 171 in 64686970.

Advancing to step 1:
If we divide 6 by 171, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 171

Step 2:
The number 171 fits into 64 0 times, leaving a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Grab the next digit (6) from the dividend, add it to 64, then carry on: 646 / 171

Going ahead to step 3:
171 goes into 646 3 times with a remainder of 133.
The next digit of our result is 3. 
Result so far: 3.0
If we take 513 away from 646, we end up with 133.
Fetch the next digit (8) from the dividend, attach it to 133 and continue: 1338 / 171

Step 4:
171 goes into 1338 7 times with a remainder of 141.
Use 7 as the next digit of our solution. 
Result so far: 37.0
If we subtract 1197 from 1338, we get 141.
Grab the next digit (6) from the dividend, add it to 141, then carry on: 1416 / 171

Advancing to step 5:
If we divide 1416 by 171, we get 8 and a remainder of 48.
Write down 8 as next digit of the result. 
Result so far: 378.0
Subtract 1368 from 1416 to get 48.
Append the next digit (9) from the dividend to 48 and continue with: 489 / 171

Step 6:
If we divide 489 by 171, we get 2 and a remainder of 147.
Use 2 as the next digit of our solution. 
Result so far: 3782.0
The remainder is 147 after subtracting 342 from 489.
Include the next digit (7) from the dividend after 147, then repeat: 1477 / 171

On to step 7:
When dividing 1477 by 171, we get 8 with a remainder of 109.
Put 8 as the next digit of the answer. 
Result so far: 37828.0
If we take 1368 away from 1477, we end up with 109.
Take the next digit (0) from the dividend and append it to 109, then repeat: 1090 / 171

Going ahead to step 8:
When dividing 1090 by 171, we get 6 with a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 378286.0
If we subtract 1026 from 1090, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 9:
If we divide 640 by 171, we get 3 and a remainder of 127.
Use 3 as the next digit of our solution. 
Result so far: 378286.3
The remainder is 127 after subtracting 513 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Advancing to step 10:
If we divide 1270 by 171, we get 7 and a remainder of 73.
The number 7 becomes the next digit in our result. 
Result so far: 378286.37
Subtracting 1197 from 1270 leaves us with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 11:
When dividing 730 by 171, we get 4 with a remainder of 46.
Record the quotient 4 as the next digit in the result. 
Result so far: 378286.374
If we subtract 684 from 730, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 12:
When dividing 460 by 171, we get 2 with a remainder of 118.
The next digit of our result is 2. 
Result so far: 378286.3742
Subtract 342 from 460 to get 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Going ahead to step 13:
171 can be fit into 1180 6 times, resulting in a remainder of 154.
The next digit of our result is 6. 
Result so far: 378286.37426
Deduct 1026 from 1180 and we're left with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

On to step 14:
When dividing 1540 by 171, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 378286.374269
Subtract 1539 from 1540 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 15:
The number 171 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 378286.374269
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 16:
When dividing 100 by 171, we get 0 with a remainder of 100.
The number 0 becomes the next digit in our result. 
Result so far: 378286.374269
Subtracting 0 from 100 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final outcome is 378286.374269, with a leftover of 1e-07.