73147855 ÷ 401 
The aim is to understand the frequency of 401 in 73147855.

On to step 1:
When dividing 7 by 401, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 401

Moving on to step 2:
The number 401 fits into 73 0 times, leaving a remainder of 73.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 73, we end up with 73.
Bring next digit (1) of the dividend behind the 73 and repeat the process: 731 / 401

Going ahead to step 3:
731 divided by 401 is 1 with a remainder of 330.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 401 from 731 and we're left with 330.
Include the next digit (4) from the dividend after 330, then repeat: 3304 / 401

Let's proceed to step 4:
If we divide 3304 by 401, we get 8 and a remainder of 96.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
The remainder is 96 after subtracting 3208 from 3304.
Grab the next digit (7) from the dividend, add it to 96, then carry on: 967 / 401

Let's proceed to step 5:
401 can be fit into 967 2 times, resulting in a remainder of 165.
Use 2 as the next digit of our solution. 
Result so far: 182.0
Deduct 802 from 967 and we're left with 165.
Fetch the next digit (8) from the dividend, attach it to 165 and continue: 1658 / 401

Going ahead to step 6:
When dividing 1658 by 401, we get 4 with a remainder of 54.
Record the quotient 4 as the next digit in the result. 
Result so far: 1824.0
Deduct 1604 from 1658 and we're left with 54.
Grab the next digit (5) from the dividend, add it to 54, then carry on: 545 / 401

Advancing to step 7:
401 can be fit into 545 1 times, resulting in a remainder of 144.
Write down 1 as next digit of the result. 
Result so far: 18241.0
Subtracting 401 from 545 leaves us with 144.
Bring next digit (5) of the dividend behind the 144 and repeat the process: 1445 / 401

Going ahead to step 8:
The number 401 fits into 1445 3 times, leaving a remainder of 242.
Use 3 as the next digit of our solution. 
Result so far: 182413.0
If we take 1203 away from 1445, we end up with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

On to step 9:
The number 401 fits into 2420 6 times, leaving a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 182413.6
If we subtract 2406 from 2420, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 10:
When dividing 140 by 401, we get 0 with a remainder of 140.
Write down 0 as next digit of the result. 
Result so far: 182413.6
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.

Moving on to step 11:
The number 401 fits into 1400 3 times, leaving a remainder of 197.
Use 3 as the next digit of our solution. 
Result so far: 182413.603
Subtract 1203 from 1400 to get 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

On to step 12:
If we divide 1970 by 401, we get 4 and a remainder of 366.
The next digit of our result is 4. 
Result so far: 182413.6034
Subtracting 1604 from 1970 leaves us with 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Step 13:
401 goes into 3660 9 times with a remainder of 51.
Write down 9 as next digit of the result. 
Result so far: 182413.60349
Subtract 3609 from 3660 to get 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 14:
The number 401 fits into 510 1 times, leaving a remainder of 109.
Use 1 as the next digit of our solution. 
Result so far: 182413.603491
The remainder is 109 after subtracting 401 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

On to step 15:
If we divide 1090 by 401, we get 2 and a remainder of 288.
The number 2 becomes the next digit in our result. 
Result so far: 182413.6034912
If we take 802 away from 1090, we end up with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

On to step 16:
The number 401 fits into 2880 7 times, leaving a remainder of 73.
Put 7 as the next digit of the answer. 
Result so far: 182413.60349127
If we subtract 2807 from 2880, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

The final outcome is 182413.60349127, with a leftover of 7.3e-08.